Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05f3dfb891dd9c0…

MALICIOUS

PDF

83.5 KB Created: 2021-04-18 14:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 01e790274a67eeebd27764d1473edd73 SHA-1: e1b7609d19f0d8317a764878a4774353a50fac72 SHA-256: a05f3dfb891dd9c09cf2dfdd7f5b79bba23366bb49c688419f92f7e7e2470af8
186 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URLs and the heuristic firings strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/strik?utm_term=how+to+set+up+second+tv+with+dish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490129/normal_6013b388367cb.pdfIn PDF document text
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/jujosetawabisupopub.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://xagogijan.weebly.com/uploads/1/3/4/7/134720006/walinifuzozitox-vatejudizefi-tilurefu-sirudupi.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/Ciaijha/here_i_go_again_tab.pdfIn PDF document text
    • https://sawanizoso.weebly.com/uploads/1/3/4/6/134654845/fiwoxetoxefi-zemupolimumapiv-filifolima.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/hwihjeQ/37234261559.pdfIn PDF document text
    • https://jifafaxima.weebly.com/uploads/1/3/1/8/131871415/sofuzon_wotodasesimage_xixilodeke_bezep.pdfIn PDF document text
    • https://walamemagiro.weebly.com/uploads/1/3/4/4/134441064/58336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fe3607d872b8.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/F2oT0gg/jebesuko.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/h55jazE/88521630981.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/zLjbidN/96006626444.pdfIn PDF document text
    • https://kebusivurokolu.weebly.com/uploads/1/3/5/3/135317059/537506.pdfIn PDF document text
    • https://zutizogemene.weebly.com/uploads/1/3/5/3/135348028/379796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_5fd884f9254e8.pdfIn PDF document text
    • https://rusipowesurajuk.weebly.com/uploads/1/3/4/5/134520473/ralukamogimo_lerezuzomo_xinufipusofita.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/ichageY/dwight_eisenhower_quotes_military_industrial_complex.pdfIn PDF document text
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/boruwa_kefosogi_lipes_jalamipud.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/pyS7ij0/hiv_retroviral_replication.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_600bf107d6093.pdfIn PDF document text
    • https://pidexijot.weebly.com/uploads/1/3/5/3/135316959/sefakadumuf.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/aDijrhg/91947856506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 4820 bytes
SHA-256: 0d253613437dfd01811277e1171a91690b2a41915d6dfa07cfe1727dd66b43b6
font_01_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 10724 bytes
SHA-256: f086c3946bad0c3af19918f5b3f0f875117e85e7b86c26da483db90ff695c379
font_02_sfnt_off000130d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e