Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e932099009bd72…

MALICIOUS

PDF

84.0 KB Created: 2021-04-25 23:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7b67cabcf4b9bd94d9360167982d3893 SHA-1: 5bf3387e596567bb59790444025c8051dc4a0a3a SHA-256: a1e932099009bd72f9644d38dbf3753f9fb4fc842d01dfec850be8d77281fe43
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/strik?utm_term=porter+cable+135+psi+compressor+manual PDF link annotation
    • https://cdn.sqhk.co/xixofivib/icicjg9/us_stock_market_tomorrow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_606a8e3b31a59.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/wakesar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_605b4227d4476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_605ddc4c79c68.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/hbgcXii/weekend_ushering_jobs_in_abuja_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_6064b75867972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_604d35787e611.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hexQjaa/37570278911.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/dT5ggs2/fowezevabekun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_605076a024489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0641358-403c-4e9d-8aaf-77ce406812b3/ping_pong_lessons_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270d7b8f-f74e-420f-870e-cccdc2e52c2f/how_to_sync_liftmaster_garage_door_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/patasijikafekefufedixilak.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/examen_ser_bachiller_2020_costa.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/bill_of_lading_terms_and_conditions_template.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/rojuvedefad.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/6978100240.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/section_6._1_ionic_bonding_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4264d918-961e-4d3c-8ed0-05db1fda1362/model_3_price_cut_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/xoxagelufagupalit.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_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 5560 bytes
SHA-256: 1ff3e92cdca0d5628ce44b212dec5b5e3879a68cc4444cf8b03682098cedb8c8
font_01_sfnt_off00011c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C81 11168 bytes
SHA-256: eb9617d5e08edb3e054571b754c7198cbfc7d907f0b02ff2843ce4537ac6a1bc

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