Malicious PDF — malware analysis report

Static analysis result for SHA-256 292a476b8080bbcf…

MALICIOUS

PDF

139.4 KB Created: 2021-03-25 02:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97c77eaedf20fec470b59cdb258ae9e6 SHA-1: d5e97680bcd40bce72615e23343a8fa08fec7385 SHA-256: 292a476b8080bbcf076fdbe8f35b1a1ce2d83894d6ab5cf2cc950b256189e2a9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://vilenefex.ru/strik?utm_term=folk+music+english+means, suggests a potential phishing or malicious content delivery attempt. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as Pdf.Phishing.Trojan strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=folk+music+english+means
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff4349b41feb.pdf
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/gileda_zowazoj.pdf
    • https://dajusokododolin.weebly.com/uploads/1/3/5/9/135964726/8753692.pdf
    • https://cdn.sqhk.co/matijamaj/H4hfhcJ/scruffy_dog_breeds_australia.pdf
    • https://cdn.sqhk.co/kigimole/eAGu7Q7/jotuguwojifez.pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/cae2d90755.pdf
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/c131d15e2.pdf
    • https://cdn-cms.f-static.net/uploads/4368999/normal_603d26ca7b49c.pdf
    • http://instapriz24.online/download_drag_battle_racing_mod_apk_terbaruwm9us.pdf
    • https://cdn-cms.f-static.net/uploads/4414360/normal_601d294826193.pdf
    • https://cdn-cms.f-static.net/uploads/4367290/normal_603f26f322091.pdf
    • https://kowedasik.weebly.com/uploads/1/3/1/4/131438617/9826694.pdf
    • http://mazers.fun/7197316173lcg7u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mizeteb/star_trek_movies_new_ones.pdf
    • https://s3.amazonaws.com/lorugipopuxe/19529929836.pdf
    • https://s3.amazonaws.com/tevomenil/18879255465.pdf
    • 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_off0001e4d3.bin
938aedf2dbb10d15451d763030d2a08d01788fce462a96e80ba8dba90c351097
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4D3 5136 bytes
font_01_sfnt_off0001f62b.bin
30cea090648e9d1be3798ab2df94b54755273d39729083e319773b56b7cb2260
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F62B 12108 bytes