Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb07274ad42b7dd4…

MALICIOUS

PDF

83.1 KB Created: 2021-04-29 15:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b7258d8f7637bce13345b5cdd31bb1d4 SHA-1: 92741b5e6bef021aec387fe00bf9aa5c637523a9 SHA-256: eb07274ad42b7dd4446f0460a8f3106a92ad711dc0a2b99817c949155b700c68
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 0.9991

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://gimoguvi.ru/strik?utm_term=what+motivates+you+to+go+to+school+everyday PDF link annotation
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/rotipowapigufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6063e205a92c4.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/fca8ece6d1306c.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/8557170.pdfIn PDF document text
    • http://jiviruke.iblogger.org/bafusatudedu.pdfIn PDF document text
    • https://gavititexufo.weebly.com/uploads/1/3/3/9/133997787/ef63d4a5045.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/3386713.pdfIn PDF document text
    • http://powogole.iblogger.org/gipuzixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fff24cbd7325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_603bc7906c299.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/kinoxe.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/1991369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_60134ed414616.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/demunivalawiwe.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/3106724.pdfIn PDF document text
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/4317138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonavijewiw.epizy.com/79913493171.pdfIn PDF document text
    • http://ziposovamuvega.rf.gd/la_peste_albert_camus_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719b1547-8552-4849-bac1-f13c9018ced4/32363573906.pdfIn PDF document text
    • http://pidisoxoxaxar.rf.gd/how_to_lie_with_statistics.pdf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3f0afa-216f-49fb-b55f-c53ef1d257f8/pejuwewewilekegejok.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/64230523552.pdfIn PDF document text
    • http://zutilokip.epizy.com/turbulence_fd_cinema_4d_r20_free.pdfIn PDF document text
    • http://dunipuxok.rf.gd/category_theory_for_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7fffda-930f-40b7-a4a7-b860304fe25d/what_is_the_density_of_cement_in_kg_m3.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_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 5528 bytes
SHA-256: 031445c05a123c8ee911cdfaacf5c1a955a86b8895a4d399c086722831345851
font_01_sfnt_off00011847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11847 11196 bytes
SHA-256: 4d5a530e591a1702bbce33e141a753c78fbac252612ace7fafabbaff1a7c22e1