Malicious PDF — malware analysis report

Static analysis result for SHA-256 942eab4cb3ffa943…

MALICIOUS

PDF

69.8 KB Created: 2021-09-29 09:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d9ddbf4d8188a52e173c7bd757868740 SHA-1: 4a0373d59904f7232a176d30ac991296b4181f71 SHA-256: 942eab4cb3ffa94323f94c15a5b4adf3299c9cac32b6346d525e700e4b253f4f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lead users to malicious content or phishing sites, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://philabc.ru/uplcv?utm_term=free+cod+points+2020 PDF link annotation
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16133c2bf68353---32347794014.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/86136774856.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/37513366574.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/85228033261.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/78125540948.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613b698c21525---deketoru.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/80464422458.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea233649ed---gedoxuxoxilu.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/bekugepebixefej.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/14683047387.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/dopozediluwubojemu.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f64d26f512---lifixubesawosolisowidi.pdfIn PDF document text
    • http://idcla.net/upload/files/fokejudesazux.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/39861905735.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/vedadoxubebina.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/didijijapekob.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-18/20210918230130986096.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba882f2c86---78375909842.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2509e9902ef92baa1697d4a7f42872d9/xamevit.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/94881891824.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/bizufuvazobexovobusaledob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B4 16852 bytes
SHA-256: 41b9744be3d24e546ee52f8b9b90175d90abf0e08710124c5bf145f7ff15d2bc
font_02_sfnt_off0000f220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF220 10516 bytes
SHA-256: 1fc7f1a2e9bf266fd527b1a548c553e79e7a404137d3a88ae0d25bd4116d39d9

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