Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f067bc2444acab…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 04:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e3abd4ec3ba0801a8e86258f7516c0b2 SHA-1: caa6e083fa7c0d02abda257d4e54e9b3e3126d51 SHA-256: 08f067bc2444acabf7b1aad1f68c99ae83df40a0c398f341e5f7cbe3e3371789
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1539 Steal or Forge Credentials

The PDF was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating it's a lure for MFA/credential harvesting or callback phishing. The document body is heavily obfuscated, but the presence of numerous links to potentially compromised CMS upload directories and the nature of the heuristics strongly suggest a phishing attempt. No scripts were extracted, but the embedded URLs are indicative of a phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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) or Microsoft license-boilerplate 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://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a09bf11ec7---64836644367.pdf In PDF document text
    • http://er-trans.com/img/produkty/files/23038269330.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97e3617901---xumejuxumufubosaval.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/87929920715.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/81053347810.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/21596226156.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/cub89viocvjch035dndbihddso/garijiwimiramulagifu.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/lonedojufinizosesikematu.pdfIn PDF document text
    • http://sun-eko.eu/files/file/bafagopalitudobezi.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/69799626446.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7a3c23c613e5f7b144fba11e067ba152/31157858047.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/44586815223.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/besefebutivawosemogu.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/815f77b2295f17213cac6fc4b4e72e74/44000521208.pdfIn PDF document text
    • http://pasted-radio.de/web/files/buloziwupi.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/004ee9e6cae8452740935077f22b0b13/33444469765.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/edh3aaac20632ka18ad4db4on7/perax.pdfIn PDF document text
    • http://axwelindia.com/uploads/ketitefabi.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/8811080387.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/texogobipejaju.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc2ae7201---96974883455.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bec3420da7c---43991690243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+can+i+unlock+my+iphone+if+i+forgot+the+passwordPDF 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_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 11448 bytes
SHA-256: 859cac088ad31382eb87b12c81255c02bdb98f69842f42fe9bc5255a97d034d8
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 17084 bytes
SHA-256: e2dca5f03c9ef6f4bd1dfd598b83c079231786f4f9514f9db4d970e0b8dd2500
font_02_sfnt_off000134ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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