Malicious PDF — malware analysis report

Static analysis result for SHA-256 a097eddfedc1d9ed…

MALICIOUS

PDF

75.7 KB Created: 2021-03-10 09:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 689cc735cd2541da5a976576b3ca49cd SHA-1: 5717411b504ee5340208efc4d1f4d8a91c15d6c1 SHA-256: a097eddfedc1d9ed2e3b8fadf4edec78a98712277041e157199a99591f995918
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of a URL with a 'utm_term' parameter further supports a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=celebrity+x+factor+rugby+players+performance PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457849/normal_5fdebf9778089.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/2324427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_603587ae55a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_5fc7c4eda3e32.pdfIn PDF document text
    • http://jepatugikanoxuv.iblogger.org/xelodezizafa.pdfIn PDF document text
    • https://fozabezadako.weebly.com/uploads/1/3/4/6/134639332/7750b92.pdfIn PDF document text
    • https://nizerekudoni.weebly.com/uploads/1/3/5/3/135383630/getadojuz.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/7750209.pdfIn PDF document text
    • http://zonafuluza.iblogger.org/causes_of_bone_marrow_failure.pdfIn PDF document text
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/6960617.pdfIn PDF document text
    • http://tekabufoj.22web.org/weximojipetokidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fcb30616dc02.pdfIn PDF document text
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/5635688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lusafawapinoxe.rf.gd/vanity_fair_season_2_episode_1.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_69864770f2184d808c3069ae10ec8e8d.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_5436dce84fad41c3861a61749d0dc4d8.pdf?index=trueIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_726eb7a2c9564ce186c2eae9f1c3e834.pdf?index=trueIn PDF document text
    • http://bonitadobizaw.epizy.com/72056593318.pdfIn PDF document text
    • http://merijezogaxik.epizy.com/17823183464.pdfIn PDF document text
    • http://belunovozexuse.rf.gd/78700601967.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_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 5548 bytes
SHA-256: 30d054c113873ee6f7daf87640f8eea39c30907f6399520b2b80a92b453b88da
font_01_sfnt_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 10836 bytes
SHA-256: fe9eb861517efca7679bc17e446a9c5ef9fb98e4664bfcdf3dfdbebb5159f132

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