Malicious PDF — malware analysis report

Static analysis result for SHA-256 d624468e6101153a…

MALICIOUS

PDF

69.7 KB Created: 2021-02-24 11:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f045ea5518ae326b07e210d50fa5dc61 SHA-1: e695d18b8ad80fa630a0d762f61c7d16a0f0a5c6 SHA-256: d624468e6101153ade938c3c2047403e21cf30a89fe162c3567df29056e77890
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=garmin+oregon+450t+manual+pdf PDF link annotation
    • https://bojemoravegoda.weebly.com/uploads/1/3/6/0/136095552/6bd9362d5ecbb.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/2QNgizp/super_dancer_chapter_1_winner_and_runner_up.pdfIn PDF document text
    • http://1gusevshop.space/bootstrap_3_collapse_jszmfj0.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/itWcagg/topadovitoxuladejoxojo.pdfIn PDF document text
    • https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/fobafanikexetow.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/2gjeTWz/nail_biting_polish_near_me.pdfIn PDF document text
    • http://bezprovodov.guru/ruzij48ofs.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/ihafigd/lyrical_lemonade_hoodie_ebay.pdfIn PDF document text
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/besesuriwapedew_zugezebanifapa_bevazilopesodat_noritewewir.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/PggBjg4/gatavazenavasutimi.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/mE8JgeC/96819215218.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/wemewogab-mademasidediv.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/ichwbhc/big_chungus_meme_soundboard.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/33728692385iczpv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/cinema_hd_app_for_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/days_of_the_week_exercises_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/50582300599.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/22675597011.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_off0000d3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EE 5568 bytes
SHA-256: 6a97eca2223dfccc18d4a99c5243c850d02e0b58d6e86a4b21e8c1860c8f458c
font_01_sfnt_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 10248 bytes
SHA-256: 5943f038890fa48da123fc22f1449b95eb2ae236f220a44441080e41ef757b66

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