Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8cd0acfdaf1901…

MALICIOUS

PDF

69.4 KB Created: 2021-06-02 09:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4d7d3660fdc96e0cdd013a7241c7448 SHA-1: 0bd03dd171defe7fd30d758faf62c636ac89533a SHA-256: cf8cd0acfdaf1901c6ded31cc1f38dfd409b3edaca964188086316edb07e51d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it is malicious and has been flagged by ML classifiers and ClamAV. The document body, though heavily obfuscated, contains text related to 'free Robux' and 'no human verification', suggesting a scam or phishing lure. The presence of embedded URLs, some of which point to suspicious PDF files hosted on compromised websites, further supports the malicious intent. No scripts were extracted, but the overall structure and content point towards a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/004a15b3f32dad08afef89fe659ace59/nozerafipolupupul.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/201deb75b3308e876fce5bd31c3b8678/90503123459.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/eiq2d7ovdbugm3nsju1mrfdlp5/fugofudi.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/acccce3a10349cba52358ceb7089bf00/19086642433.pdf
    • http://abimobiliare.pl/pliki/File/66493900151.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609004ced705a---jupivevabumomadi.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824dc6338a2---rawagi.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/e6e66800fd632d1965b22101943b983b/22280052323.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/76odlakirchgsh20rusohdulu5/54034663824.pdf
    • http://alarcon-v.com/editor_upload_image/file/42533336188.pdf
    • http://steakclubhn.com/campannas/file/susosiwi.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/jfj4qmvqbc77uv2sbj707cj7pj/10939210242.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/7s6cd36c7mga9i4ktcvmtfttfq/98053704851.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/4df03adfb74dc0adf15a73d48c4df2f7/99267694218.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0d2b8dadf---1352957826.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+get+free+robux+no+human+verification+no+offers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ad.bin
9ee10beab097cf6969c665f0451060c8be069e7c7e73ad80257f3884df12af46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 5584 bytes
font_01_sfnt_off0000e4a2.bin
3bcbb97429bdc8aade0f605203c9b9179b97d218e519682f92f9b343ba4876c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A2 10520 bytes

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