Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d8d3d30b4cff20…

MALICIOUS

PDF

76.1 KB Created: 2021-03-11 04:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 84278fa13c7dd4c7c7e8bda64e070fac SHA-1: a2e9a36cc1f88f7a8a481494185c69cfa5de6e0c SHA-256: 07d8d3d30b4cff20141988d2adee5437b1371f112762d568d4a4a5fe21151766
96 Risk Score

Malware Insights

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

This PDF file is identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm designed to obscure malicious content. One of the primary URLs, 'https://pelibifir.ru/award?keyword=bpsc+syllabus+pdf+download', appears to be a lure, while another URL, 'http://rokosarod.rf.gd/gexanewopawewe.pdf', is likely the actual malicious payload destination. The document body, though heavily obfuscated, suggests a deceptive intent related to downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://pelibifir.ru/award?keyword=bpsc+syllabus+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418574/normal_5fded65dc9a9b.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/pugarobep.pdfIn PDF document text
    • https://cdn.sqhk.co/pidikuso/egd9lHa/pc_building_sim_free.pdfIn PDF document text
    • http://libifutolile.iblogger.org/semutikuremane.pdfIn PDF document text
    • https://lamosovi.weebly.com/uploads/1/3/4/6/134600354/8744037.pdfIn PDF document text
    • https://cdn.sqhk.co/ruretibot/hSAeNEt/89837628743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff541387b385.pdfIn PDF document text
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/regomiguwivanebul.pdfIn PDF document text
    • https://mepapezivodeno.weebly.com/uploads/1/3/0/9/130969154/gidekapuxosojefok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rokosarod.rf.gd/gexanewopawewe.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/devatu.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_f9e852b8aca74986a72ce4d997627327.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_faa8a3738a9446a38c7d813cd02e7467.pdf?index=trueIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_b96550a3423e434689bb54752ae129a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/what_is_spotted_lanternfly.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/49791412080.pdfIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_380f63e76d094f44ad9f5003aebec974.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/name_with_birthday_song_free.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_1f49e17d915d4418b8fd083f5a65eca7.pdf?index=trueIn 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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5436 bytes
SHA-256: a9e4690f38e38c305583cb9e26809f668407c29bfe325c17ab8842050fdaaf4d
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 14840 bytes
SHA-256: a53eb87c3415a252c53c838b35a814d9609a8d4c7d2d6251eb2ce73f42ecb043

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