Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6b0c2d8f47b6c2…

MALICIOUS

PDF

75.1 KB Created: 2021-02-20 15:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc6fd289ff35ed549bab537c0b799293 SHA-1: 1926b337bc9f0bb7d56c9ef9155ae6e116c9ea7f SHA-256: 1b6b0c2d8f47b6c250664038e2f0733cbfbaff18ac2a914a1fac863d83af40e9
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://jacksth.ru/wix?keyword=world4free+movie+wiki PDF link annotation
    • https://cdn.sqhk.co/fujonexa/iiPVlib/radioactive_dating_game.pdfIn PDF document text
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/dovefevamemaj.pdfIn PDF document text
    • http://golden-charm.ru/geziklzpx0.pdfIn PDF document text
    • http://trenolgia.buzz/banky_w_naija_for_liferw5cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_6029ebe324ddf.pdfIn PDF document text
    • http://amsidisi.xyz/16957416802jands.pdfIn PDF document text
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/kajolox.pdfIn PDF document text
    • http://tuimag.ru/10385078369adl79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_601ccadc1d55a.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/losazidogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5ffe0147e50d0.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/kugajiminofejop_kulitolupape_rubemivutonuku_podisofaj.pdfIn PDF document text
    • http://ecoservice-vlad.ru/adobe_acrobat_editing_textzuhoe.pdfIn PDF document text
    • http://yesstore.pro/new_ho_adivasi_video_song540nh.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/fovezewi/mapsource_south_africa_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/free_android_7._0.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/38237661609.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 4980 bytes
SHA-256: 096e3aa0bcdd638066e943cca4a6f2db783e291a5c5b31dc0ac09ba8b84af069
font_01_sfnt_off0000fbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 10416 bytes
SHA-256: 1fa59380fc1099c360b9286caf0536a3015b2721d5bba65cd8b79dccc8fdaaab

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