Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce42a463955a89d…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 18:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b029efd3bf8222a1010040bde1ccaf1 SHA-1: 9ad03a438e579c285bafd27ccf234fb82196ab78 SHA-256: fce42a463955a89d3f3ed430888042517d9b0cce4865060ad951078ee16c420f
312 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors. The document body, though heavily obfuscated, appears to contain lures related to customer service and urgency, consistent with phishing or scam attempts. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://yafferge.ru/aws?utm_term=how+to+contact+zagg+customer+service In PDF document text
    • https://nobazivikiva.weebly.com/uploads/1/3/0/7/130776215/1fa747.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/jubojix.pdfIn PDF document text
    • https://xaliwituxezaxe.weebly.com/uploads/1/3/5/3/135323019/laveraj-sedabirosetonev-beluke-jivip.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/b4515f8783.pdfIn PDF document text
    • http://totipuzuforaz.mywebcommunity.org/fenewagazejen.pdfIn PDF document text
    • https://tibefuwejar.weebly.com/uploads/1/3/4/3/134332688/934150.pdfIn PDF document text
    • https://budigalaxob.weebly.com/uploads/1/3/5/3/135313384/raruvoneta_jefepanug_zadexuk.pdfIn PDF document text
    • https://gogujezirud.weebly.com/uploads/1/3/4/6/134655685/2133388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b0cd6070-80a4-4137-98f9-de6216cb2537/golds_gym_xr45_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe641a4-b446-4db7-a694-043bf1fa0d36/my_kenmore_dryer_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e704087a-0ee6-4daf-9843-56e966c944c9/setozuzunivavujom.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/opening_blend_s_bon_appetit.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_e4b0de1685634effac6d2f7464800924.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_905ce5aa8a2a4ff78a0920be7f9ef8a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c57097-a251-48eb-8e0c-944bbc9e5148/what_weight_oil_in_air_compressor.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_fc8d4d3d908b44c1aa5a48fcdc17af48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/bitdefender_latest_cracked_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474398ec-d0e4-4664-abba-981c051e49bd/majiwavonigunowezosevenej.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_72bb67468a3f4dba955532cf9021654f.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 5132 bytes
SHA-256: f867a0fd06271b8b69cb673ec55ea6594549d52bbbf3e75db25e3b92c2f7496b
font_01_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 11228 bytes
SHA-256: 0e61b4c7433fcbf7535652367fb85982da4e32d0b4b96a3a7277cca1b5123245
font_02_sfnt_off00012692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3