Malicious PDF — malware analysis report

Static analysis result for SHA-256 549a177cc456fe24…

MALICIOUS

PDF

76.0 KB Created: 2021-05-13 06:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 73cddfe6c1a363f3adc71d66359d17e8 SHA-1: 7f35334e515b7bdb12b37f862cd02855dd83ccfa SHA-256: 549a177cc456fe24e0a803624cc661fd15c26c9c087b4f7541e9f191a761768f
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or phishing lure, evidenced by numerous external links pointing to disposable domains and potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=how+to+tell+if+my+ac+is+a+heat+pump PDF link annotation
    • https://cdn.sqhk.co/jisanipu/uDhghj7/is_hallmark_movies_now_free_with_cable_subscription.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/8dhagcd/6486951870.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/0249626b.pdfIn PDF document text
    • https://fefedajukuda.weebly.com/uploads/1/3/1/0/131070841/1789989.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/nalet.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/dexufifaximud_firugotupotiso_genigadob.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/zuzepigi.pdfIn PDF document text
    • https://cdn.sqhk.co/lapotalodige/hiIjggh/zomekogelafijibalej.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/zenijedan.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/EK2geja/nujomukixutixar.pdfIn PDF document text
    • https://gojanevalu.weebly.com/uploads/1/3/4/3/134353606/38ca58a.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/hag2OKE/xijonobi.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/vuvumifoxozotosisise.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://bomekabekoz.weebly.com/uploads/1/3/4/8/134863976/jusapevodoteto-bomozano-fajalawexinak-gizoberi.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/bupesejirijejus/xefim.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/graco_swing_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/66984497212.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/defenders_netflix_parents_guide.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_off0000e97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97F 5316 bytes
SHA-256: 39ceaaeef6da20968ef2787f70c1dedb2b1507c14f7dc12a4d9863de829a3028
font_01_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 11024 bytes
SHA-256: 59435fc1697393db091afc823ebdf36556e8328a06b513e27084c0948090fdb4

Open this report in the interactive analyzer, or submit your own file for analysis.