Malicious PDF — malware analysis report

Static analysis result for SHA-256 6025acacdf00ec6f…

MALICIOUS

PDF

85.8 KB Created: 2021-03-07 06:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d515b1e6486b8eae63468dbd31164c5 SHA-1: 935a304ca40f30fd79fb18bc8fedccd6c937fe66 SHA-256: 6025acacdf00ec6f916b67517e3afefc60b579ac633a00a5fa832fb172c4ec75
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a quiz, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=vampire+diaries+quiz+who+is+your+boyfriend PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/hghijZz/xagemijalanubover.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/jefilusati.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/why_wont_my_laptop_turn_on_unless_its_plugged_in.pdfIn PDF document text
    • http://jikawixekeras.iblogger.org/bullet_train_game.pdfIn PDF document text
    • https://cdn.sqhk.co/dorumexogik/jatEid8/aqualife_3d_mod_apk_1._5._8.pdfIn PDF document text
    • http://leraxedosu.22web.org/blood_ph_alkaline_food_list.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/lixolururixojaj.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/gofafimofunusozosuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/aHhb7ig/palemolumapefud.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/44483134179.pdfIn PDF document text
    • http://duxogesubuz.22web.org/56137597119.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/how_to_unlock_a_whirlpool_double_oven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_eb58da98822749ae89a6a4fdc2fd36f3.pdf?index=trueIn PDF document text
    • http://zitegarapopufis.rf.gd/kenmore_elite_direct_drive_vacuum_brush_not_spinning.pdfIn PDF document text
    • http://xifimerin.onlinewebshop.net/lijiko.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_254b13d35dad46058a09986df2bf848a.pdf?index=trueIn PDF document text
    • http://zunaxixe.rf.gd/suzalafuvofofegijibijutik.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_1621b378fdd749d790c76052e3608178.pdf?index=trueIn PDF document text
    • http://zuxebalu.rf.gd/antivirus_avira_gratis_para_android.pdfIn PDF document text
    • http://fajukowopod.epizy.com/nelco_sewing_machine_price.pdfIn PDF document text
    • http://vejawogi.rf.gd/what_is_a_psychological_evaluation_for_police.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_off0001102c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 5724 bytes
SHA-256: 0d277d9e61429e909cd8ac00295ce87e4ba1af226a7b2818576fd2a19084d8aa
font_01_sfnt_off0001239e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239E 11232 bytes
SHA-256: de9426b16ad57d1c1b3899dd98d76f5c3f7d256d97b9f4cb3e9ff7a10c799f1f

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