Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddd2159d9172e81…

MALICIOUS

PDF

74.4 KB Created: 2021-05-06 22:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d2151839cd962a9f75a99378ffcb80a SHA-1: ae91fd9adb872f8605965cabbfed97506ffb9be3 SHA-256: dddd2159d9172e814b8408f01746d5a859a50d4a38dc192cda1d9ac2ce078a2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to quality bed sheets, a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/93ca0231b7f0070a57f2c3136c2ea65a/vesixozukelifigusar.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a5014c195---fugenodugidamudegere.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609411083441f---77909199745.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b30edb960---89785628979.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608164e9dba2c---ribozorokutazijodus.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/cfbe855c6230a9161d3ca104743e15e6/winukadezezirugosis.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/egpktdibruv8bk0gvk2nfb1jdr/27315362062.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/fc5c08d964a52b7050cea28b3b0921fb/pudetanamitulusumu.pdf
    • http://ahsaipu.com/v15/Upload/file/202151157469500.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/90b5a3ec5d927044354b9cb453948e95/supimoxo.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4b639443f008fe463174d25ac0a23d82/24935868658.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/hnp17m88vucbhi6hv19f4kdd72/76942591927.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c8e3a7012adfea4af39858bdb5689490/revanulebufalurefivenuf.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/95d56a16212ce3ceec21e95a1e669b98/12349792609.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b02bd89237---94674976595.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1f056783edbdf79aacc0eeadb148e735/11996021217.pdf
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b96807573---xapobizum.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607594933e274---jafaxadalam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=quality+bed+sheets+melbourne
    • 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_off0000e7cf.bin
75eb52c8d5d0d1b4ab9e9943046576c512b9132eb318b5411adff7657292882f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5368 bytes
font_01_sfnt_off0000f9e1.bin
589e92d8b27472bf3405c3c3707bfa516098807e890099b77f0127e9c3f9b4f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E1 10392 bytes