Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a76461d27e0e20c…

MALICIOUS

PDF

71.3 KB Created: 2020-12-31 22:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a25dcf9fad08bb5ca360f9b21d4cfe SHA-1: 72a72ac028ae0cde767f883df6dd0ce5c011fbd4 SHA-256: 1a76461d27e0e20cba42d5e404ce46ab0c02c0e35cb85bffc07844035f3ccf6b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF files hosted on external services. The primary URL suggests a lure related to 'world war 1 map of europe 1914'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=world+war+1+map+of+europe+1914
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/9051813.pdf
    • https://cdn.sqhk.co/pivugisaxap/iCjeUha/41474934699.pdf
    • https://cdn.sqhk.co/netimawifes/ihqhu0l/18252528907.pdf
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f91505c56cd4.pdf
    • https://cdn.sqhk.co/sezogitov/Rig9Uhi/my_talking_angela_download_gratis_pc.pdf
    • https://cdn.sqhk.co/vefutifeves/bAhjUhi/duo_app_free_download_for_android_mobile.pdf
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/wifunafej_lifolojivaxoso_fulolemafiju.pdf
    • https://cdn.sqhk.co/rilixuzewiv/ajhjaFv/72559069794.pdf
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5fca2d5485660.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fb66bf6d279e.pdf
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5fce057a228ff.pdf
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/diwugavorula_jibitep_fidirowewesibo.pdf
    • https://cdn.sqhk.co/seponidozit/dhahdje/48743336950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db8b.bin
1c027ac37427a7fef74873af6e83dc93ed52bded01de54b046323a77894d88af
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 5408 bytes
font_01_sfnt_off0000edfe.bin
b2957cc7bbbe5fd0ddabfddc25c049e4e60666b9f8c83f4a2bbc3332c15b83e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 10144 bytes