Malicious PDF — malware analysis report

Static analysis result for SHA-256 864e58e3980941f3…

MALICIOUS

PDF

76.6 KB Created: 2020-12-10 11:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5c89b94bce389d27ff314c5d210b78ab SHA-1: 5dacf374af9bb839d33d0cabcec51440ef91a0d4 SHA-256: 864e58e3980941f3b105df87e4d1788b308f1bfdfe3f295f9099c38cfe34d77b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/aws?utm_term=baby+poems+video+free++urdu In PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/0b0d3495.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc7229a5fecd2174b5919a6/1606886042944/34579028991.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/fejejoparudalotikawude.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/97977309359.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce594c169f3e188a7db36a/t/5fd0b573ef76c20f2d4f80c6/1607513460583/assistant_to_the_regional_manager_shirt_the_office.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0252f81c9a2a0c68cbf9/1606287955851/ladelokuviwonibugeta.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/75760373923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d785973-0a83-4977-bc14-50c317dcfabe/60573626597.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/bazokivovugopefatuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/minecraft_xray_texture_pack_1.5.2_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/kufiretunud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf96cde554aa35411a25b8/t/5fd1d567ef89ac668377d8b4/1607587179267/tasty_planet_forever_download_pc_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1651bc89e1c4b8fc1e357/t/5fc3059f145a8629dc147838/1606616479394/pavadewubatoputi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59aeaea4a794d566534d6/t/5fcaacc0a400d748f5c26f6f/1607118018122/equivalent_fractions_calculator_online.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5508 bytes
SHA-256: e532c8ec27a10c98ab9a694db59c57b981d1343c80756754b2e947daeebd7c78
font_01_sfnt_off00010359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 9528 bytes
SHA-256: a13ea4247b5f8f764d393312069eda217344973155f06c7540c99925a040e1cb

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