Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ffc029b1a2bbd9…

MALICIOUS

PDF

78.1 KB Created: 2021-05-09 11:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e2fcc352ffea80fc0ab1d8a6e8a5b27d SHA-1: df0921131e791fb2acd8103897ee29bc638103bc SHA-256: f6ffc029b1a2bbd93c86f86e82bd45cbfdabfff2f592231c80ee9c3ee9ef6e08
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://xajibur.ru/strik?utm_term=fluid+dynamics+textbook', which is likely the primary lure. The document body, though heavily obfuscated, suggests a deceptive intent related to educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://xajibur.ru/strik?utm_term=fluid+dynamics+textbook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470389/normal_605268198188c.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/e8bae706f61b.pdfIn PDF document text
    • https://wupovejiti.weebly.com/uploads/1/3/2/8/132814541/bimel-mabodifuvaje.pdfIn PDF document text
    • http://topcabinets.xyz/watujojowow20mg.pdfIn PDF document text
    • http://niwawopomovaz.22web.org/acanthosis_nigricans_patient_handout.pdfIn PDF document text
    • http://vehicleinsusa.com/how_do_you_use_a_brim_espresso_machinen0djx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_603567638cc78.pdfIn PDF document text
    • http://aazzzry.space/zutigucrhmo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419857/normal_5ffc69cd98342.pdfIn PDF document text
    • http://tukameduk.22web.org/dufifamadafewaguzogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5fff67147ef63.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/tatefu_jifaxi_jibun_livosowegisato.pdfIn PDF document text
    • http://13millions.store/asana_pricing_enterprise9azc8.pdfIn PDF document text
    • http://chaptejvxz.fun/13483736391ikuom.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/rorives/bradesco_seguro_de_automvel.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/jegibigaxojisizubap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a41808-eed7-4779-8c99-0e395d1630cb/esv_large_print_thinline_bible_black_genuine_leather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c62ad9-31e6-4df4-84e6-746ec13f5f44/37168706018.pdfIn PDF document text
    • http://vakisetituli.rf.gd/nosotixixot.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/lanivebodokilo.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/jopilevujudetolawatim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe465047-ec8d-46c3-8696-a0856de70cc4/f_distribution_table_.05_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/nicholas_sparks_books_new.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_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 5320 bytes
SHA-256: f00df863d2ec3dda9fccf909574e477916a8f59afe2bb3d4b21bcd4e840cf5fa
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 11432 bytes
SHA-256: 10b567e80fb5ad125013a11b1041900dfe1c59db0d3169ea7de0628c9caca0e0

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