Malicious PDF — malware analysis report

Static analysis result for SHA-256 407f54a1aa2e5692…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 17:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f79c4b25f77be6772a787ebda8070a75 SHA-1: b5ab3d8b267bb50e8f56729024a31ba8ff2d7202 SHA-256: 407f54a1aa2e5692782dc54a8b098ac807c16dcc85251453e966d4d86f02307d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to PDFs hosted on what appear to be compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of a raw IP address in one of the URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious classification. No scripts were extracted, but the document structure and embedded links indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • 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.
  • 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://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16142874cdc89d---23906519796.pdf In PDF document text
    • http://doradcyprawni.com/images/pliki/66503415301.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16138ef64ca316---gevepulevovasavexiz.pdfIn PDF document text
    • http://vizcsap.hu/files/file/80654413428.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335dc5965c7---tokakubudepul.pdfIn PDF document text
    • https://photojet.net/userfiles/file/fifejuwusafirenave.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/64980928237.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a1dd9560596f7aa425320cd8794e08b5/67402245214.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/sarubijorikakoxotexukuj.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/xofujatakijibifoxu.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/rewisogej.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/3b129d7bd19757757a8bea4409212f66/winajodetaga.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/66783564245.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/navupupim.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/towumakevezalef.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/57939202647.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/111554460.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e44e16d4121503e496326ae49b55fb09/70704973914.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1b67b79a7ccee58327b9ee525e0cf6d0/xokoludunilimaruzojuxama.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/12435313717.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210901_070716.pdfPDF link annotation
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/5c2a3d0aaeb44754f7fe2730b90fbe0a/nulik.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/51097176013.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/gixowunubati.pdfIn PDF document text
    • http://dhf-china.com/d/files/71202367001.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/webomatodarapovatoritad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=android+nandroid+backupPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/46377834601.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_off0000e6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 17452 bytes
SHA-256: 028bfa65f72406488a1edf6b40d654cf6c30a4475dc4068708c3183515ca11cf
font_01_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C00 10376 bytes
SHA-256: 8e510a1bf6563cf98a6ce24abaca953be4ec9b73068d97b242b312cf089ba66c

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