Malicious PDF — malware analysis report

Static analysis result for SHA-256 80307a5d3b409311…

MALICIOUS

PDF

77.0 KB Created: 2021-03-11 04:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 94d26de2817ffe3e6ce4e1b0eb7dbea2 SHA-1: 1f6b873c49f580510f6d7233854463af51b774fa SHA-256: 80307a5d3b40931147ede0b4653d0f18d548fa066d8001dcee4be4931fac0c5d
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. The primary URL, 'https://bologen.ru/strik?utm_term=ncert+english+book+class+7+solutions+pdf', suggests a lure related to educational materials, likely to deceive users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://bologen.ru/strik?utm_term=ncert+english+book+class+7+solutions+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417815/normal_5ff65d59b5332.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/4180249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5ffa2d6a6b1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453901/normal_603bbcd6bc027.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/ghjdOl1/mcdonald_s_menu_prices_2020_breakfast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_60203c8222940.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/rIZ5jcu/balenciaga_3d_mannequins.pdfIn PDF document text
    • https://bolowarokarov.weebly.com/uploads/1/3/4/3/134349384/jofewasosi.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/zuleduti.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/zalisufenug.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/vrThdjg/ottawa_bagel_shop_nutritional_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_6011de3caabbc.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/iidibP6/kulaxupun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_f7f066a441284e92bb3b8ebd42bdc203.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/bronchiolite_obliterante.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/bang_bang_movie_tamil.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_6369be2a4b0f4eb89876ca5514813b2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bahubali_2_telugu_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/nature_reviews_molecular_cell_biology_impact_factor.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_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 5668 bytes
SHA-256: 697ed1ba03fe797ec821e33668ce8065d73d9193a92111227a6bf3593e34e15b
font_01_sfnt_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 10904 bytes
SHA-256: 7a4a0df762ed57b249a6e2e2370e465da097c20a246bbdba767733eb475125e8

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