Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0396a19e29f209…

MALICIOUS

PDF

63.4 KB Created: 2020-11-20 04:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3b06886ae1d059343832e339ca92321e SHA-1: 7696eba17989f78910769e05b4d1beff93ad0a4e SHA-256: 3b0396a19e29f209d77d6c48167cd97afacdcd39fdbf9739d375dd6f2be90818
234 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=greenwood+athletic+club+hours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f972d0fc740b.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/ripetokaduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5f9503bc66a46.pdfIn PDF document text
    • https://zibiputuwe.weebly.com/uploads/1/3/4/8/134886395/zoxijofib-masugefagu-pajizamatelifow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f9bec7fc985b.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/1635272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394073/normal_5fa0ceb9efb0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fab1779b2813.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/210815b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fa9887f3f989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea72644-d56d-4d6a-bfda-ef5b81edb237/29756436868.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_off0000b870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB870 5288 bytes
SHA-256: 1d90dc26ea303c29bd7ee13fb1d9c2c707ffe957bea97cfca94a33d2db253255
font_01_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 11388 bytes
SHA-256: 3f71b5dac368885bf124035d3eca49aa9588e206cb204fc96c1d6d77de50424f

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