Malicious PDF — malware analysis report

Static analysis result for SHA-256 000b3ed8f954ae78…

MALICIOUS

PDF

80.6 KB Created: 2021-06-25 14:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 448a2558ebf5e6255060d9ffb79d932d SHA-1: cee41253ad180849bcba63b530dccb5b4ca8d3b4 SHA-256: 000b3ed8f954ae7841f0f0f93ecb048005e38fad39d9f5bdf9d3e14611c232fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://advantagelic.com/singhania/downloads/file/74055530129.pdf
    • https://festival.bg/fckeditorfiles/file/kejelefeboseperorax.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c109cdf2d4---vejafufowoxokefibo.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ajufjo7td68obu5hhdtjh86hku/18778430218.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/ab146624d5d99e8a19cd49114df01008/21920316456.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a400817b2d0---gojatujudenomepadudi.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16091f20263075---folovukoladojoga.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/61082210942.pdf
    • http://cosmickino.ru/sadm_files/72559601667.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/412c8de2a04fc86e918e189113c75cea/pawirugodaxetijozarubat.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/tem45plhfofajonvhl0pejnjm4/19136344807.pdf
    • http://bilmatbasim.com/userfiles/file/lilosiridufej.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/d941a378872ef7668e87be36bbf19c16/fesovuloxobamilowilanega.pdf
    • https://pjkconstruction.ca/images/file/gejuwajaxor.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/13m6jcv56ce95fjkk21iarh1du/wubiwesibufe.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0423db0238---44100390497.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b992bc8d6---vadixidakupidukerumodob.pdf
    • http://inarchengineering.it/userfiles/files/68385950206.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tongue+twisters+in+tamil+pdf+free+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d2.bin
54108cd02a07efb2e0b7807b21568e9f50235d25c4b89ada0a07b2815550b7f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 17584 bytes
font_01_sfnt_off00010390.bin
8142fbf5b24a02b105bb6cf41f5c68bd9bec8df66b3fb4a18674b0d334f377c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 10988 bytes
font_02_sfnt_off00011cfb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFB 16792 bytes