Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be684bccda049df…

MALICIOUS

PDF

82.9 KB Created: 2021-06-28 12:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ab754f97121a6bd8c3805be4b53b462c SHA-1: 9b2d427a09aa223d30528be375a07b859472c0f1 SHA-256: 0be684bccda049df927eb173ecd77577ac728ef632bb45a5195e72f28949ac3d
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs that point to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to potentially malicious content. The presence of a raw IP address in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://adsbudget.net/userfiles/file/82488961381.pdf In PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb5070001---kuxasamelarebobip.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad34c5c64c---vujovu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160960d0d7b7d4---kuxenodizum.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/b14d1baa617ee1739454687383000186/fivaredoripenugusomib.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/71049813535.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/23831740115.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/53048614694.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/f3f9263704f1038b845480190011165f/xuvazosesugexexad.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3jcq51cjnf3mbbhdbda6febhon/lagad.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8e8cd891d---vojokuwivofaberagawedagax.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/65104363447.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/xajilonikorijedadarix.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993481d9e79---81107686863.pdfPDF link annotation
    • https://prtl.pl/userfiles/file/bunasupida.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c59408d021b---63475633168.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9489c1df9114e0b2e15e21c9365ee82a/rilavotenu.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/18608424112.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/83aebfbd8af0a745c156f557c36b60c9/kewigatosamor.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c72485d33a1---93894206268.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d033dc392164c39bbcf6cee30f7a31e2/biviziko.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/mejulodufor.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d5b877f75---laloriwuwadivinit.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/segazerodan.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/waniwineriro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=one+piece+strong+world+episode+0PDF 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_off0000d04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04C 17592 bytes
SHA-256: df9fd8eb464dfca8cb5026d96483df2070a1fff3cd947c631ccb5a8484173bd0
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 4068 bytes
SHA-256: b35748fec63af2e9bdcae40d07c9265dae48b2110439cdfb63e45c7d5bc75fea
font_02_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12505 10760 bytes
SHA-256: 55da7962a7d6835f5aa8b9be66fb279da6fde1100119f8c21c65831dd3ab57f4

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