Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2c70cf5a24ae65…

MALICIOUS

PDF

92.8 KB Created: 2021-05-11 21:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ffade740f9e5f9afb2845bb15fe36a92 SHA-1: 27c930d033b352e93db1c4c68309b76a3c81a8b0 SHA-256: 2a2c70cf5a24ae65c161488735b182f19a2add2ea55418b41b581909ee638e4c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt, likely using embedded JavaScript to facilitate redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/strik?utm_term=diagrama+de+fases+del+hierro+carbono PDF link annotation
    • http://yewes.space/23519450587goyhs.pdfIn PDF document text
    • http://uptodate.site/975290685858pabw.pdfIn PDF document text
    • http://copyrighthelpptteam.com/monster_truck_movie_cast_namem3qg5.pdfIn PDF document text
    • https://notolunezoxab.weebly.com/uploads/1/3/4/8/134846452/dudelimixinuvu.pdfIn PDF document text
    • http://baby-slings.ru/aha_bls_test_version_a_2016at56o.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/GhcZcm5/baby_pink_phone_case_iphone_7.pdfIn PDF document text
    • http://com-signto2.xyz/ledidibiwixukozopajirea54lt.pdfIn PDF document text
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/32b4ee3e160cef.pdfIn PDF document text
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/6115182.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/iejajhg/mepemowaradekumosavumoto.pdfIn PDF document text
    • http://3203epworthcres.com/fantastic_beast_and_where_to_find_them_charactersjh8dz.pdfIn PDF document text
    • http://chatik85939775.fun/how_to_repair_a_toto_toilet_fill_valvemo9jm.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/ijg8jeb/second_american_civil_war_2021.pdfIn PDF document text
    • http://trells.space/tesaletx90kj.pdfIn PDF document text
    • https://ragesetenavuxom.weebly.com/uploads/1/3/1/6/131606186/fowido_wunuvobubas_sumebokifini.pdfIn PDF document text
    • https://cdn.sqhk.co/gasidonoda/V4o9gf1/41863310508.pdfIn PDF document text
    • http://biomanua.website/31689131757ln0ay.pdfIn PDF document text
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/xaminutukezuru_vilogeruro_sazadinalezar.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/6dbc16.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/tumofavupipewaredarazagu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/97414007159.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/42293281948.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/lomevupumirow.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/50435805274.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_off00011f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0A 2136 bytes
SHA-256: 28f9048eebcb64f0772edad61ad930100ef300817814c5643d5f262fccfc875a
font_01_sfnt_off000128bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BC 5572 bytes
SHA-256: 42d7aaa993a4842ed65925c3eee5dc3b642b54becd5af04f10d4def632021807
font_02_sfnt_off00013b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8C 12384 bytes
SHA-256: de31be0a586aa5a9db3c9bd04da413f10d667db449983c02f7dc7978e030bf45

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