Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5f549c34c2e87a…

MALICIOUS

PDF

62.7 KB Created: 2021-03-20 03:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfbcf82eda56804c19d434cc8ac0d40d SHA-1: fede9a3e1f47efff15dead06136c34c68b8bf160 SHA-256: ce5f549c34c2e87a48a7584ea283dfd206b76527fafd8fb3c3c978b2cb1bf3a8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a `utm_term` parameter in one of the URLs indicates a potential tracking mechanism for user engagement with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8467

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
  • 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
  • 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://xezojetit.ru/strik?utm_term=how+often+to+drain+lg+front+load+washer
    • https://rebadezoj.weebly.com/uploads/1/3/6/0/136027304/8307471.pdf
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/jebumabomog_xamuxovije_jisobafiwigoxi.pdf
    • https://pevomoten.weebly.com/uploads/1/3/4/6/134626000/sabugifo.pdf
    • http://zupubovogigu.iblogger.org/18662948323.pdf
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/9679370.pdf
    • https://sejukato.weebly.com/uploads/1/3/4/0/134018084/zedulazoj.pdf
    • https://zigafofidonid.weebly.com/uploads/1/3/4/5/134508062/ronifotegugodozeg.pdf
    • http://waxawazurutane.22web.org/19133095851.pdf
    • http://bizawojumufa.22web.org/how_can_i_download_tux_paint_for_free.pdf
    • https://nuguserofaj.weebly.com/uploads/1/3/0/9/130969707/3442600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jokotaziweluge/fortnitemares_challenges_2019_guide.pdf
    • http://gadoxijumulop.epizy.com/android_vs_ios_development_2018.pdf
    • http://bodotekufuw.rf.gd/64247735710.pdf
    • https://s3.amazonaws.com/retisovojor/reformas_economicas_borbonicas_resumen.pdf
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_770f670bd9604f88b0c6448edef173be.pdf?index=true
    • http://gobonelore.epizy.com/how_to_read_journal_articles_in_the_social_sciences.pdf
    • http://bopadem.rf.gd/65950875202.pdf
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_03037082824844378d26a4de146ec9d7.pdf?index=true
    • http://zelejiv.epizy.com/pigawozisinuleraroredu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f7.bin
17935ffebe4f35bc3bc67e161f69d0a0094f5619a9cc87c2205045233593b894
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 5008 bytes