Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b7aa764bceb9d9…

MALICIOUS

PDF

108.7 KB Created: 2021-03-15 09:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d528d284f1d188211806256728ac7104 SHA-1: bbc7996598d3935e8c5f4df8135a2bedcafffe6b SHA-256: 20b7aa764bceb9d912ec9d6e484dcd65d49b3957013ed2bca318dc9793ea3279
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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 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/strik?utm_term=the+twilight+saga+the+official+illustrated+guide+read+online PDF link annotation
    • http://sopisafexuj.sportsontheweb.net/streamline_steam_loco.pdfIn PDF document text
    • http://trysoda.pro/922838357w8h8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465389/normal_60288ede4e4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_603bd30ad4e0a.pdfIn PDF document text
    • http://pressit.fun/22243678368ybszg.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/w8icick/spirit_airlines_baggage_fees_coupon.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/venture_capital_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_6018bbf52bbd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_601981819fae1.pdfIn PDF document text
    • http://talemine.getenjoyment.net/kotifodozizotigavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_5fe73db26092d.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/excel_formula_if_cell_contains_then_count.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff3b657154c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_602bf572ea2fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_604cff106fa2d.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/ghiglrp/pedal_up_mod_apk_revdl.pdfIn PDF document text
    • http://virona.org/80754539570w5mb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_5fd91b7dad4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_602207c7d2d3f.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/xafelirasod.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/concussion_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/YqkhfIt/64611056294.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://dezinolabebosod.atwebpages.com/hernan_cortes_conquista_de_mexico.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB2 5204 bytes
SHA-256: 7ad98af5df98b3149a2a52cd656c496ee7d4769d2a238133fa4cf32f6870a408
font_01_sfnt_off00016e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6F 11700 bytes
SHA-256: 9b413f3c23df2e1c0456d0a88f39ddc60fef50e3f98d65799d1c8e8632aca5f7
font_02_sfnt_off000195e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195E2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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