Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80a0e0b73b2b4e4…

MALICIOUS

PDF

83.5 KB Created: 2021-05-12 08:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 63e5c5abeab31bbe060e2ed596845e91 SHA-1: e78fba08cd56356a91f23aa890af9e023a09b597 SHA-256: a80a0e0b73b2b4e41df22baeeee85fa0aabc14433e6466ce4ee441891725a1e6
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious content, specifically identified by the PDF_RANDOM_URL_LINK heuristic pointing to a suspicious domain. The embedded URLs and the overall structure suggest a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF's nature and the presence of external links strongly suggest it's part of a phishing campaign aiming to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://baarspo.ru/strik?utm_term=final+fantasy+7+original+ps4+cheats PDF link annotation
    • http://privateguardingserviceagainstdanger.site/cours_excel_2007_complet_gratuitqzsbw.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/hiaIpiT/baby_toy_farm_animal_sounds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_602cfa10d09cd.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/b91b31047a97.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/giipYPm/stick_war_legacy_cheat_mod_hack_unlimited_gems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5ffbaf69aed93.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/c705ee54f.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/4122349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5ffa6ee012f12.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/gdygegd/lightsaber_colour_rey.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/MjjBqLT/49831295352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_6015ab0c73b06.pdfIn PDF document text
    • https://xolitosoxi.weebly.com/uploads/1/3/4/5/134583661/560234.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/FhgA2Ad/spiral_christmas_jumper.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://gadegeganex.epizy.com/duxazedodor.pdfIn PDF document text
    • http://fowosirid.rf.gd/51012547721.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/reports_of_the_exchequer_court_of_canada.pdfIn PDF document text
    • http://dixurudij.rf.gd/79988337382.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/65272318620.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/jonivoputoxarozof.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/sea_of_thieves_error_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/problem_statement_sample.pdfIn PDF document text
    • http://fozuzize.rf.gd/did_anyone_died_watching_the_exorcist.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 4868 bytes
SHA-256: 0680d5f7424c852e386950a86020bbb6b47d226ed40d2fb95999d52390ec8c58
font_01_sfnt_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5292 bytes
SHA-256: e76fef5b7c12eaca893b68979c364d1e7bcbcee810ae122fa90b45c500472ef8
font_02_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 11508 bytes
SHA-256: a9e8793cabba956955c4924a36049636b303710207d43528999bb6beb1350672
font_03_sfnt_off0001301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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