Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b1f425d469ffa9…

MALICIOUS

PDF

112.2 KB Created: 2021-01-07 20:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f1324e6b138658912cc4e9f53d70985d SHA-1: dfb954a57ba8981258a7a09c20932fe76990f320 SHA-256: d6b1f425d469ffa9bbe789b735d2bb96e40cdeb3e36c98c3c2be5da2007233dd
222 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector and a link farm of other PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body's text, though garbled, suggests a lure related to login templates.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=login+template+bootstrap+asp.+net+mvc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_5fe9821c4dc5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5fca7980c7032.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/K4hfaed/5980766801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378405/normal_5fc3b3389d6a0.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/84pgeSH/92601224131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381094/normal_5fe068025d83b.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/fonuzamubinigezewu.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/bovajilamivakota.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/kegafaxuwanuzorigezo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5fc7f14f416cd.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/5833749.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/idigoif/big_head_soccer_cool_math_games.pdfIn PDF document text
    • https://newajijamo.weebly.com/uploads/1/3/4/7/134750143/2920e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00016dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD4 5424 bytes
SHA-256: b60b76edc666f905ba4f6bfa4956c8a50e088d947c2134cfa1402fae0edb560c
font_01_sfnt_off00018041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18041 14636 bytes
SHA-256: 15d8f1bcf6d7d5233f2cef7240692e3fc01182f56b55d0e409086f373449d81e

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