Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba909d3dfa794546…

MALICIOUS

PDF

73.9 KB Created: 2021-02-25 08:29:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d3cd7df2cae7b6deee4013e2462b739f SHA-1: 3122c249b222c1a85719794c0fd2b02d892a64a0 SHA-256: ba909d3dfa79454621a55b22baab6847361d36e836bd2e642912e0a1e3db2bdb
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one that appears to be a search query related to printer issues, suggesting a social engineering lure. The 'SE_CLICKFIX' heuristic indicates the document may attempt to trick users into executing commands. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

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
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://leonvi.ru/award?keyword=why+is+my+hp+envy+4527+not+printing+in+colour PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453743/normal_5ff158c2bfbe8.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/2fed1fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_600c16ac26a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_602eba4b189f6.pdfIn PDF document text
    • http://counterman.ru/89979438548vribv.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/5714a98.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/vizunap-mafemap.pdfIn PDF document text
    • http://dnepr24.info/senujupubimajovabapabort77w.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/4378665.pdfIn PDF document text
    • https://rizapomon.weebly.com/uploads/1/3/0/7/130739727/8701117.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/vojapu/pottu_amman_tamil_full_movie_tamilrockers.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/jnc_guideline_hypertension.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/address_entry_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/mojobatulipel.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/billions_episode_guide_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/95777220108.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_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5736 bytes
SHA-256: fe6b5ed0c0d6e716cb7af2e63ee1f479b5d27eb5954a6df67c1c7568f7d2a69c
font_01_sfnt_off0000f61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 10568 bytes
SHA-256: cf453072b5b3034570729894d015818c5fa8fbcf2b64c5b00b232a6f5a17c7ab

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