Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad19966aa68ca95…

MALICIOUS

PDF

87.6 KB Created: 2021-06-25 14:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ef8b4fbc98b2b11943c4da524b9aff2 SHA-1: 96a64f49263dca678b47c5b7d4b3fe700cdf3ed3 SHA-256: 3ad19966aa68ca95baab57a405ddaa15a1861bc4280d6f21922f238670e4b2d2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, indicating a phishing or malware distribution attempt. The presence of these links suggests the document is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/1168ae9f822a10f016db8704d990d3fb/wojepil.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f85d629de4---xexikubugipup.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45c98121c---96505595257.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4923195de567950004f00a2cee8304f2/95704433171.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fb014d38---45033900411.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7134570bf257b8d52c5c9ddea2f8262b/jetugarupedo.pdf
    • https://pmsp-me.com/userfiles/files/xopobed.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944214615c2---28933621506.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a2852cb89---suzekotaronuzobobune.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/f5b93eaa5b6abe555aa8cfeaa6515d2b/69901233483.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/286f7f59307ad9e1d6e1bf9369d09e9f/bibozadenamezelaj.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/cc62ac66e9cba27b2178e3e5904c3e1e/63695784641.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608204e69a03e---ravumafumez.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba20c5a6e---wunawobuforaneze.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/903c7f2ef9b1e937f424a05119eb34d6/ravomizakasoj.pdf
    • http://soflocops.net/clients/81266/File/wubekap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=advanced+financial+accounting+10th+edition
    • 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_off0000efd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 16792 bytes
font_01_sfnt_off000107ee.bin
8edf9b17178b0a0912e24a2a2d278eb1629504fb5baaed7793da610077f17e16
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 10808 bytes
font_02_sfnt_off000120a3.bin
e001812e45d5ffbc5edef514a4ccf2f895ffc64107a2b52ad0d816d90228a5cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x120A3 18180 bytes