Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5dd3cebded6acc…

MALICIOUS

PDF

78.1 KB Created: 2020-11-11 09:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 19286ec07b9d5b789e02fbeaf4bba31d SHA-1: ee974cbc36471a7ec8aff6ec112edb33f0f10c4c SHA-256: 3a5dd3cebded6acc39e5fbb14e4f478c505afe64f47a6c57cbf653616cc9a265
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one notable URL being https://trafficel.ru/123?keyword=live+in+property+caretaker+agreement, suggesting a link farm or phishing lure. The heuristic 'SE_CALLBACK_LURE' further suggests a callback phishing or tech-support scam pattern, aiming to trick users into interacting with malicious entities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://trafficel.ru/123?keyword=live+in+property+caretaker+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f88ba77d4aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f92917da4a0a.pdfIn PDF document text
    • https://sidunaxegizu.weebly.com/uploads/1/3/0/7/130776644/2a9960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_5fa648364ba22.pdfIn PDF document text
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/5fba7aef.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/7076278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5f9d241506ed9.pdfIn PDF document text
    • https://parudebizaju.weebly.com/uploads/1/3/4/0/134096066/jakopakaginexowivele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_5f9cf6b6155c5.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/masadu_minugafip_wafujuvebe_lidijomifafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/basic_java_programming_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/hardy-weinberg_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/98956733101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425d7902-f33c-49a0-a267-f02a56bf86ca/xavenunuxexonu.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E8 5208 bytes
SHA-256: d3267bb5dd9b94d21cfcd9164dea5b3f3c4e6ca3c99f38af9706ecb80eba7dc8
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 11612 bytes
SHA-256: a36454582b7b2312f9b09c706e34b48fd818aae1ff38607216e52d31b3f42aa6

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