Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2c286c7c180342…

MALICIOUS

PDF

91.1 KB Created: 2021-09-02 17:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 0694b57315bd528b55e6ac78a5e49c1a SHA-1: 7c027630c3b3377e58044bc64ba2f62ee8236747 SHA-256: 8e2c286c7c1803424747e012dd24eccbe32472fab3a88e9198d2f8d918757884
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm and a lure for command execution, likely to download a secondary payload. The document body is heavily obfuscated, but the presence of a 'clipboard command execution lure' and 'callback phishing phone lure' suggests a phishing or scam attempt. The numerous embedded URLs, many hosted on compromised CMS platforms, further support this. The ClamAV detection confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/l1lfb6l3bcu8fdhpuseb9jv7hq/kawebixenam.pdf In PDF document text
    • http://azstorestudio.com/uploads/files/zulukurewul.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce736dca83---kuxifivitodasarivid.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160adc2cc62aca---24687197140.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/n0v490oatsabcd48mhtanebdvu/93609436923.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/68697708931.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/dasivo.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7e9f22ebd86a11ee7c8f53645e064e2/63795374870.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/jabugezewonita.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099e6915b1e9---53677525008.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/54666332962.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/cc6dc56fb204a7adebeab2c3efa4c0a9/dajomutexesujukatu.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/37221184999.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a8ffc6eed77dc87097edace829ae78a4/36846890653.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210809/files/20210809045131.pdfIn PDF document text
    • http://axwelindia.com/uploads/jumazewolivufoni.pdfIn PDF document text
    • http://caramelitos.sk/files/39089811608.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/29334167178.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/rnurpfc12d7p4h3pdfvh4marjq/zuwoweriluj.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/pivexunerasumimawuk.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/32907808671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=optitex+pds+user+manual+pdfPDF 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_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 17084 bytes
SHA-256: 95ef3036e4cdc9cdd979bf20951988adbefd2024048fd120f8ccf7d57c413e95
font_01_sfnt_off00012db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CD 10764 bytes
SHA-256: 1fd0f0d0e7424a3dbf6d7cca84f4f8f8fc14c1c0bcd0044e09f13f52591b7c3a

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