Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fe46c8ed17bcff…

MALICIOUS

PDF

73.2 KB Created: 2021-07-13 17:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 364cf5483ab0603d276a77aa53d188e1 SHA-1: bad65212519c5e8122f55ba8162d967886ca927a SHA-256: c3fe46c8ed17bcff82c501b4505a345e992772adfe256b55efcab0da5961ea67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. The file's structure and URL patterns are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c110712a4---tuvibarexejozavevo.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f750c1ad---37698616389.pdf
    • https://windfreeklima.com/upload/ckfinder/files/93923832250.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/72decbe949851c3039f30a092ad1b076/xaxubepavanebal.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/demipaweveduxarojowolonib.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6689649bdb7f49d961a45ff841fa6936/52575939600.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/18a4efb5137777b72d66df799a3f9186/61993295339.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074d76cd6c30---9096966847.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/f76fdb410c0750ffc3e96cb00c7e5900/28936218250.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160777812c73ca---83975106090.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb48179c39---bemixaregolig.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c774a1c9842395ea401585abc3010853/71735532128.pdf
    • https://suprizpin.com/calisma2/files/uploads/75726253047.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/db9470d7703ba070665bfb643ea6da4f/92414945155.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/d21fe4cd4ac18cd2446092e220d5f334/liwepafofow.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5m5nv0leb2gcu7rn2sr84itvg6/dajofobadimonodegigotod.pdf
    • http://atek-ent.com/upload/file/dixefiputapusoga.pdf
    • http://maslag.eu/userfiles/file/bavevosadovalevi.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/e28v2jnlj5t2ieh2ojn5dbhsgn/89482519144.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/9325b95f504234d864270ec30eb24e89/45259096562.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8d33c505b6fb6180652cbf3617fef22e/8911203303.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee13e91fed---nazatumilawenukegukepod.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b34f38d3---gefufakafugobuselamifeta.pdf
    • https://pezenasenchantee.fr/userfiles/file/40563477566.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dominant+intermolecular+force+in+ch3oh
    • 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_off0000bd57.bin
af594d94c2e8acf60a81959aa46575ba3fa5806271fccb44837cb2458ff9ae69
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD57 16336 bytes
font_01_sfnt_off0000e720.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 16792 bytes
font_02_sfnt_off0000ff37.bin
c02bebf416d7f3065452f2f39c9f5bd8aeb3e68dfec2fd8f393665bd97b3ba3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10704 bytes