Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5706542b5c090b6…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 18:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 115260ce10577cab668c701da7e5482a SHA-1: 806e28942dd0263d97397c9a73ca8cb5d49d31b4 SHA-256: b5706542b5c090b649f16cedf24e0cb0d9b0375806099984b111b740c6482fe1
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/kebejodirijapusozu.pdf.
  • 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://ponafet.ru/aws?utm_term=what+is+audience+profile+sheet PDF link annotation
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/kebejodirijapusozu.pdfIn PDF document text
    • http://e-sparks.ru/wallet_app_apkkke4b.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/xufadoju_pufakobigaximi_zokigit_tobefiporu.pdfIn PDF document text
    • http://roman-holidays.shop/tablet_wont_turn_onma4u4.pdfIn PDF document text
    • https://zuwuloju.weebly.com/uploads/1/3/2/6/132681456/zimosuvulig.pdfIn PDF document text
    • http://doxisodezezaku.iblogger.org/zoxowewoxadonedajovejuja.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/popabuwulu.pdfIn PDF document text
    • https://wazajatagif.weebly.com/uploads/1/3/4/3/134376275/57a66b.pdfIn PDF document text
    • http://kzrovk.xyz/saxosolovosepis8f0hw.pdfIn PDF document text
    • http://yesnutural.space/tsm4_guide_classic_wowcoown.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
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_b2fd75372945429d903a7555d24c0811.pdf?index=trueIn PDF document text
    • http://dabudevegifu.rf.gd/25868676015.pdfIn PDF document text
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_e9a6114a09884123a62d214e5c9ed987.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_a31d30ffc3234a9690f72282ec98aa24.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_26a1ec8eeb774088a1a2ddb6b223f662.pdf?index=trueIn PDF document text
    • http://kutepiguzusudax.epizy.com/8th_grade_textbook_answers.pdfIn PDF document text
    • http://bajebozirodiv.epizy.com/steuererklrung_2017_anlage_er.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 5140 bytes
SHA-256: 3b3089cb32969728f750b03c4dbc6eb29c1cbc46bb09e3b78b285334f6cf9e67
font_01_sfnt_off0000f554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF554 10944 bytes
SHA-256: e9e689af8fd04391c899817a4913e34e096fc76c133d7a3ebe22a09cb1fe3aff
font_02_sfnt_off000119f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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