Malicious PDF — malware analysis report

Static analysis result for SHA-256 61af74160cf93be0…

MALICIOUS

PDF

47.2 KB Created: 2021-03-15 13:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2902fe25cc3cbec68ed0c37d13e9b230 SHA-1: a23fc62799f245764cb98300243f9ec133f9866c SHA-256: 61af74160cf93be010f38a4172d4d21852bfa9560eb6836a1b63f3410f85f985
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7842

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
  • 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
  • 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://druttle.ru/strik?utm_term=all+souls+church+new+york+ny+10026 PDF link annotation
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/768028.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/63289027076.pdfIn PDF document text
    • https://ninusava.weebly.com/uploads/1/3/1/4/131436980/gadikazizef.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/44093001372.pdfIn PDF document text
    • https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/dc714331765c.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/fivaxikumadixak.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/193cd6d796d7426.pdfIn PDF document text
    • http://vulemese.iblogger.org/10753597032.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/tomorrow_when_the_war_began_cast_tv_series.pdfIn PDF document text
    • http://gitipakivo.iblogger.org/totally_accurate_battlegrounds_mac.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_5987f527e3ea4ad98961dad7111d0bb1.pdf?index=trueIn PDF document text
    • http://kozosakesaganu.epizy.com/power_electronics_internacional_sl.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_43d36577f22e4d099ca5a5f90056726d.pdf?index=trueIn PDF document text
    • http://majarufejugoxo.rf.gd/calendario_2020_mexico.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_965f0072783f4bf5b28e3bd56bd1a054.pdf?index=trueIn PDF document text
    • http://lakumufo.epizy.com/44582009203.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_ffe89d45c7b447bf990dcff469e2c659.pdf?index=trueIn PDF document text
    • http://lelurofu.rf.gd/the_expendables_4_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/10599808207.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/ratitoxumuxozexisekanamuz.pdfIn PDF document text
    • http://japamitafixe.myartsonline.com/dumujibowarumeriro.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/vilozuseget.pdfIn PDF document text

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