Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6a7507c4bed3c6…

MALICIOUS

PDF

119.3 KB Created: 2021-03-16 07:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cca236cd2af2db65fb0902554cb6ab05 SHA-1: afd37f425874c820f139ec9b797759d8fb73035d SHA-256: 8e6a7507c4bed3c64605e83a05630cd0b679b72d212a643fdad67e606d6d94a9
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were extracted, the presence of embedded URLs and the heuristic findings point towards a phishing or SEO manipulation attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/wix?keyword=lifetime+sports+definition PDF link annotation
    • https://fosogizubosa.weebly.com/uploads/1/3/1/6/131637108/28c5f89c4.pdfIn PDF document text
    • http://lunurapezos.iblogger.org/bofezetexipuv.pdfIn PDF document text
    • https://wufujaxuwagax.weebly.com/uploads/1/3/4/4/134400484/1514202.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/dotej.pdfIn PDF document text
    • http://duxaromovaxizom.iblogger.org/cannibal_ferox_full_movie_300mb.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/junupurogekas_wezire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_2dd49f8b2c864e779313032ad82ef3cf.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_2d15306c0c1a44d38a27a2d597e4f40b.pdf?index=trueIn PDF document text
    • http://biwisuzasasare.rf.gd/32373364667.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_bb6c434e1ed64e5d91d3e2368e45a277.pdf?index=trueIn PDF document text
    • http://segalemu.epizy.com/dafavolabugudof.pdfIn PDF document text
    • http://zinipuzotekum.rf.gd/gegixidosurifofirusuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/42835151961.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/sugagofedufabuzolufago.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/free_turbo_pascal_7._0_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/bpi_savings_account_form.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_off0001989e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1989E 4888 bytes
SHA-256: c275e17377064aeca82fc728420e91713bb0c3a66483ad3330804d446c245843
font_01_sfnt_off0001a92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A92D 11464 bytes
SHA-256: 42e932e7f69f647cc9e2a3695770464878d6f19df97a7fcd844d3f48101b8a22

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