Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5f1f6fd07d6de7…

MALICIOUS

PDF

100.4 KB Created: 2021-07-06 18:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 93d4ae19d182449f9ca6a42a716ead35 SHA-1: 89440c2421d01d0e69d98d8348b8cb2f6453c5b0 SHA-256: 0e5f1f6fd07d6de74665d744c1eda055d630986a3dbe341233ea6ce785b24ec6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the sheer volume of suspicious URLs points to a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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://irlanc.ru/uplcv?utm_term=apology+meaning+tamil PDF link annotation
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ieiu5pqdp9m03vog3giom5j4a0/xavoxufajetanefabubupeveg.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/64045038772.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/84338481520.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/113bb412f777699ea77a0a3b360f2334/xigabugafajidotagofadaboz.pdfIn PDF document text
    • http://2440027.ru/upload/file/80549348706.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a8082a6e73e8a7b850a11ccf513dae16/66692298244.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/susimogumewojuliwutud.pdfIn PDF document text
    • https://ms01bet.net/contents//files/gebopefenosejilesab.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38150c734---jufomajepamasugisaga.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/15159822991.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/0b1bde0957693931e9cb1f869885c99c/38666908505.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6c85d8d5---raperaxokokap.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ae0a8743---wonenejimaterejeder.pdfPDF link annotation
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/1b1736fac37f6d7b28d97dba2bf7c27e/goturejisa.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/makulepak.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/robozewinaxeza.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725ffc8ff9d---7663073380.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/ruwudadukofupikoja.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/891158ac2c7ee858550c0182462b210b/zugirojenubutusetizatu.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/60819656779.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb415845d---68704277340.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd42f7909f---zemeluba.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010c2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C2A 20024 bytes
SHA-256: e77a848b3f212ae940023baf02a73a09cde1c6308a28b98c9561ff4309dceb96
font_00_sfnt_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 10424 bytes
SHA-256: a0bd6eeb12734b7abb1914a4012c7c2fd1019d24e7e0703ce10735e33351bcb3
font_03_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 27728 bytes
SHA-256: 1952335e4da80e6a2eb969466a9fa3853c23e05e578c1ad69f7296f49292b675
font_04_sfnt_off000170e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E9 4904 bytes
SHA-256: cfc6e7c21fbecad42158f150fb879951b97797ea72736dffe38303da38cd3f24

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