Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2af96765d87e48f…

MALICIOUS

PDF

78.2 KB Created: 2021-04-19 07:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 36efa6e587f556087242f6e2b9cd7602 SHA-1: c56a326ff399e8dbc234d2c6707e3abe881b20e5 SHA-256: b2af96765d87e48f283875c421df54b9cf1c20ffd837c747b14ddf4e873ad648
126 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 high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('bologen.ru') that is likely part of a phishing or malware distribution scheme. The document body, though partially obfuscated, suggests a lure related to 'tricks', which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=how+to+do+air+hogs+supernova+tricks PDF link annotation
    • http://nubolats.xyz/tuzugovukabezowinogepitkm32.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Khaiahf/werewolf_novel_prompts.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/xiaomi_mi_a1_android_10_alacak_m.pdfIn PDF document text
    • http://antonioit.fun/13005391502j84k4.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/dapiwaretum_buzuduzew.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/icquhfd/gamamavesejezul.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/91695b51.pdfIn PDF document text
    • http://digitalmicroteter.xyz/3317579534t0kx5.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/1131875.pdfIn PDF document text
    • https://cdn.sqhk.co/fowujizul/ieie6gj/subaru_forester_sj_off_road_parts.pdfIn PDF document text
    • http://jedunoba.iblogger.org/ge_repair_contact_number.pdfIn PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/voranabigurafuvu.pdfIn PDF document text
    • http://newberginvestmentproperty.com/bhu_bsc_nursing_entrance_exam_question_paperai8uw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_e3a24818a29d45e1a5a137c1684f5511.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42fd7aa2-3eb6-470c-a976-6416f899ede1/describe_the_three_estates_of_france_before_the_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25107cdd-56aa-4500-a3d8-2e1f4f894dec/preface_to_lyrical_ballads.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/how_to_know_intermolecular_forces.pdfIn PDF document text
    • https://471876dd-1950-42f1-a4b7-18bccbaeda70.filesusr.com/ugd/5d8976_a2489910d11e49e6b32c4e4b9dedb24a.pdf?index=trueIn PDF document text
    • http://molugepunab.epizy.com/bolenilunig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb14266-7cbb-49c6-be0a-6c16cf75c2d9/gukurizejiz.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_db1c7d2829654197adddc9231efb7b08.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_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 5480 bytes
SHA-256: 85ca5f852577f2c5eec74354801da5778004a968babc9cab1a6fe0fb2c76ecb1
font_01_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 11564 bytes
SHA-256: 8e15f96aa412c871dbb628c1b8f31a1f92dcb3dd5011c249af8c49c43e0dc03e

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