Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1f29b47c9d11fb…

MALICIOUS

PDF

69.7 KB Created: 2021-03-01 13:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7b088320ef1009b470a02b4c099a0d68 SHA-1: 720900e4e84e0f3f2fc353954159a34b87b40898 SHA-256: fa1f29b47c9d11fbaec654c9b875e55aa309162ffb0a64d3629311328fbe1ca5
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'bologen.ru/award', which is flagged as suspicious. ML and ClamAV heuristics strongly indicate maliciousness, specifically classifying it as phishing or a trojan. The document body, though heavily obfuscated, contains keywords related to awards and serial numbers, aligning with a lure for malicious 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://bologen.ru/award?keyword=king+serial+numbers PDF link annotation
    • http://ximuvitu.iblogger.org/webanuvarexulowex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375207/normal_600263314fa72.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/badger_insinkerator_15ss_3_4_hp.pdfIn PDF document text
    • http://katipef.medianewsonline.com/signs_and_symptoms_of_post_op_complications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501380/normal_6013f58134066.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/fusidazowedigagife.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/idgLhiR/kidirubezudokumatase.pdfIn PDF document text
    • http://subeziti.22web.org/janunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_6032ac769647b.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/Jlgcgx6/zufiboxojupovaxatu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_6008c66f387f6.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/Egfjdid/2048_balls_3d_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5ffce3581d733.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/vPigjie/game_booster_launcher_screen_recorder.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/juzinaramip/wpf_combobox_itemtemplate_width.pdfIn PDF document text
    • http://mirurisiruxowal.epizy.com/50943061244.pdfIn PDF document text
    • http://dubured.rf.gd/kazijexuwutuzivituga.pdfIn PDF document text
    • http://tunazafagid.epizy.com/psat_practice_test_1_answers_explained.pdfIn PDF document text
    • http://pogapebod.rf.gd/embedded_video_from_website_online.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/321520089.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_off0000d5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 5112 bytes
SHA-256: 40ea71d4a4d3fe686d6e63497d9cc89a3f995e024d586503f9dd1a4c8b7ee92b
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 10208 bytes
SHA-256: 21605aabc514b2f1a0cf79898a9f86ee23cf6c7916a7a03871d968878d72aa27

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