Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d1348004abd547…

MALICIOUS

PDF

113.5 KB Created: 2021-07-01 10:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0d2bdc6d6536a63004be98b25a35cd9d SHA-1: 71480faf6736ac1b4b11150cc32ca18a696d70e5 SHA-256: a9d1348004abd5470570f01d7c1d3421a888587c161be90a54457b3fceb5a63c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress installations, suggesting a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://curryleafharleysvillepa.com/hang/userfiles/files/barimenoxokimikaza.pdf In PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e607987e659136b72177c28d8c9e8482/sokifalixelufit.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/lamekaxixawivo.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc663dcac---94602667606.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a58251265---41448275387.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcab0a5141---tevutenimifadosifelis.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/97814337840.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/59280847145.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/3c1e7146e801aec3343b8e5f1c42d284/xutasujuzode.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/75725212148.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/71296847341.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a159c0486ea---69036326992.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/s9o0rn2jlufc5k0dj0uead0h67/balimowuwobajujerojatu.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/cee364bef4fa086bdec48f7508eb215d/86463707134.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/368838cd977e428207d8c68ea20d2f53/supawijovefoda.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/tozuj.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/sd3h7f4s086bnqob481rqdceu7/venevuwevap.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0682469e7d---64051413931.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a94ad7b1231---12396074957.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/109e2607f8e21527af107bdd01aa85dd/nozigabowurekezodow.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b85eba5e906---68745345357.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c0217aac2e8---bomupixax.pdfPDF link annotation
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/775868f1d852d8beb974193a412decb5/solexalaluja.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/fd30c662c2535b7c9477d4dda153e1c5/32679070941.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982193f31be---18235524635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+feast+of+shavuotPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001396f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15186 10100 bytes
SHA-256: 02057c5ec14921a0491c88724d51d88ae30bf89e79c128a5a281222a7b9c023b
font_02_sfnt_off00016846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16846 18268 bytes
SHA-256: 38fea45577f71a8be7f472f2030ff14546a0c791909b0fe5b44a64cd912cc691
font_03_sfnt_off00018584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18584 19288 bytes
SHA-256: d761ce69085a568f21001954423da3f1143e1b00ca7bbfccd5d0636177e81809