Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f269721206a7481…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 20:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12dc202c9688de78fa0acc0f0211a0b7 SHA-1: b63a481919cd3f5b9de748a830a1a04a9f06a841 SHA-256: 7f269721206a7481a0161da49fe01ef88485c0b0fcada1947ed4b89ab7bed144
176 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing scheme, where the document prompts the user to call a number for a fake issue. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into engaging with a fraudulent service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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 http://ressourcengarten.de/azubi/userfiles/files/88217598715.pdf In PDF document text
    • http://polins.org/public/userfiles/file/nezolejematu.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/2785844453c157c29ab1e17ede0d9f0f/16656862047.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/siwomabijod.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/11376116522.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/87248077044.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1630516463.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/loxafefuri.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/5667133450.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/88985501978.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/vegorevirez.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/vamuxegegi.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/90746905042.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614015a155d45---35597876824.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/13724953824.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/zegaw.pdfIn PDF document text
    • http://timocomputer.cz/files/file/44397269983.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/53066876520.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613e808aa4ec5---75820955542.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/kirozezanadoki.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/9e38fcdf734f0dd1ff5983fcde48528c/85010197089.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/16429043418.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136121703ada---70174102973.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/27035254292.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/81324436244.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/22904673224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=largest+gas+reserves+in+the+worldPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 17484 bytes
SHA-256: 090604aace404d6b9a570bf4e1ce7f57c25170fd5baa7a46971a0a85ec4a0e5d
font_02_sfnt_off0001269b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 10636 bytes
SHA-256: 4408c589a53cd40f96800ca556ea3f62e2c2a4ea84494eb4b4e5554a83e8c7d6

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