Malicious PDF — malware analysis report

Static analysis result for SHA-256 84343c816d519deb…

MALICIOUS

PDF

81.5 KB Created: 2021-04-03 10:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc943e2ba01f556f1b1db1a09e815666 SHA-1: a91e4f2a68ce58b4fc43105cbd895f7de1a698bc SHA-256: 84343c816d519debb2d97d4133c6eec35fd30211bf8df067567929b35f273764
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 phishing or SEO spam campaign. It contains numerous external links, many pointing to disposable domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to game cheats and PDF metadata, suggesting a lure to attract clicks to a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=super+mario+galaxy+2+cheats+dolphin PDF link annotation
    • http://axacheat4.xyz/13675988391jmbf3.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://se-mrush.com/wuwulimidoronirugagujoja0a2uv.pdfIn PDF document text
    • http://fitness1.space/lipeduxijida8duz5.pdfIn PDF document text
    • http://superheatbelt.xyz/weight_watchers_bodyfit_smart_scale_ww800a_review2wgvy.pdfIn PDF document text
    • http://levantemosaic.com/omegle_tv_pciphuh.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/koludubimidosek_muverilolorak.pdfIn PDF document text
    • https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/8006964.pdfIn PDF document text
    • https://tisitijalazog.weebly.com/uploads/1/3/6/0/136017937/tozasuzazap-fusomod.pdfIn PDF document text
    • https://pimakesoxokozo.weebly.com/uploads/1/3/4/0/134041299/1f7337f87.pdfIn PDF document text
    • https://ratemalopez.weebly.com/uploads/1/3/4/7/134753477/2149725.pdfIn PDF document text
    • http://sodaapp.pro/is_ib_acio_exam_conducted_every_year51wpf.pdfIn PDF document text
    • http://tugalisebizizem.22web.org/macroeconomics_free_download.pdfIn PDF document text
    • http://sejapamuji.22web.org/zekusuzodibujeza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merawaboz.epizy.com/36531251313.pdfIn PDF document text
    • https://38e81cab-313f-462b-917d-d566bf782aa4.filesusr.com/ugd/36aba1_949a5c4296774d5ea5e6caab0994ba16.pdf?index=trueIn PDF document text
    • http://sawokemapixaf.epizy.com/wovogatapipur.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_e11561dc3b904e77bc1f90f30585db8f.pdf?index=trueIn PDF document text
    • http://gemebewi.rf.gd/52471120962.pdfIn PDF document text
    • http://xojakejib.epizy.com/17474306768.pdfIn PDF document text
    • https://b6e5a19e-d001-4475-aab2-28afce3d71cd.filesusr.com/ugd/bae363_25b28cbd97824f91b26e44dab0247f77.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_2bd8489aa55249beabab9a9a2ce6ecd8.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_74ca0ea1d43a46ddb81c81274704713b.pdf?index=trueIn 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_off0000ff03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 5892 bytes
SHA-256: 3efe040099b32f43f6c9df03c2b178ff9d14ab7384f35149aee8becd03ed3a36
font_01_sfnt_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 11120 bytes
SHA-256: f026c549651f6e01a0092314fb9cba35e9e8c012547a9622133c7a5758b3f10f

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