Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f1ed7b3a51ade3…

MALICIOUS

PDF

86.7 KB Created: 2021-02-26 13:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c6ce255997188da4aa5df5e7c934d9e SHA-1: e4db623cc6337e0cbcc039e7d0fa0178ec588830 SHA-256: d2f1ed7b3a51ade38894cc6242686a5d7884d35330793c5b963ef7e4779dfeda
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external PDF links, one of which is a direct link to a PDF hosted on 'davufemalolaj.iblogger.org'. The document body, though heavily obfuscated, contains text related to 'the highwayman poem questions and answers' and a URL 'https://jumiwimov.ru/wix?keyword=the+highwayman+poem+questions+and+answers', suggesting a phishing or SEO poisoning attack. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=the+highwayman+poem+questions+and+answers
    • http://davufemalolaj.iblogger.org/97151287532.pdf
    • https://cdn-cms.f-static.net/uploads/4470979/normal_601629d535eab.pdf
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/d8f8537.pdf
    • http://reduslim-europa.site/sagugasubewugepikilunotoswe9ol.pdf
    • http://dombitarf.ru/adobe_premiere_elements_manual9nlig.pdf
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fdb7f482aa57.pdf
    • https://cdn-cms.f-static.net/uploads/4489593/normal_5fe72fb2b9daa.pdf
    • http://probmake12.xyz/67268929498a98sb.pdf
    • http://bred-enligne.com/pinocchio_picture_story_book8c52c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sowirutelevolur/easy_chopin_nocturne_sheet_music.pdf
    • http://ragirawarema.epizy.com/verenegunukikitavapuven.pdf
    • https://s3.amazonaws.com/piwanisaj/what_order_do_the_artemis_fowl_books_go_in.pdf
    • https://s3.amazonaws.com/kaxukok/43063445322.pdf
    • https://s3.amazonaws.com/dudigonifu/gunekubodarami.pdf
    • https://s3.amazonaws.com/legapatatezisa/murutera.pdf
    • https://s3.amazonaws.com/wovisak/maliludidolajepob.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/ark_survival_evolved_mobile_requirements_android.pdf
    • http://bawokexumavi.epizy.com/bhavani_ashtakam_songs_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065b.bin
9fc673d9c79a65cca23e4aa6c57d196dd3a990107b21b8f566f043bcc21495c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 5492 bytes
font_01_sfnt_off000118ef.bin
ac7215e84dd481de3a4eafeae354ff1444086cfce147b9deea9fe318356b683a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118EF 11132 bytes
font_02_sfnt_off00013ec2.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC2 4324 bytes

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