Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0861d85a74f841…

MALICIOUS

PDF

73.5 KB Created: 2021-03-20 20:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 460e199caf9057e91e7f657eb2035b7a SHA-1: 83780fd53cd3ef678086a216a2282677afaf39f5 SHA-256: 2f0861d85a74f8416deebf7b7cefe0265637d29d11e18a2cd6e5e9d929634812
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/123?utm_term=turboprop+flight+simulator+unlimited+money+apk PDF link annotation
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/98b54e85c.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/jywRgfS/89113309441.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/zasufo-korasororumebo.pdfIn PDF document text
    • http://zuzimosutikume.22web.org/71597601871.pdfIn PDF document text
    • https://vagovewov.weebly.com/uploads/1/3/4/7/134722861/galut-kiluvavakumuzi-fitepapon.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/7e650f775ec.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/ic8hglH/pemafenivipixurinavojuse.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/filib.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/iij2egd/dopifal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_2b8a15cd617b4fcdbcd8cd7284d972ca.pdf?index=trueIn PDF document text
    • http://tesalivolanimeg.rf.gd/difiwala.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/cdca_endo_manual.pdfIn PDF document text
    • http://lilivuwujiwet.rf.gd/citizen_navihawk_change_time_zone.pdfIn PDF document text
    • http://jigugepolega.epizy.com/retakit.pdfIn PDF document text
    • http://loxeputogojew.rf.gd/alpha_type_stirling_engine.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_ec48182c92b6415e94274041d2773903.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_1e61ec9cda60419d8397f82882bf1565.pdf?index=trueIn PDF document text
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_78f649651a2f44c5a3d557fa1263a92b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feliso/vebaselowufenuwarunazi.pdfIn PDF document text
    • http://leliruwe.epizy.com/38514420231.pdfIn PDF document text
    • http://ligirewela.epizy.com/54025363563.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/barememajenowigalux.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_c78ae32034314b449258b9853d79ce4e.pdf?index=trueIn 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_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 5708 bytes
SHA-256: 9d430f437caab0ba0a500a4481db203c172de636cbcb54e8946da306fb65c159
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 10172 bytes
SHA-256: e6e31aecd846e097546a72e624b62b4093ce696a899a5b59bcca9e5c67e2a84f

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