Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6aa94efbc58c48…

MALICIOUS

PDF

76.2 KB Created: 2021-03-15 05:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 179050a86e72975e9b3df158ec6b0f29 SHA-1: 952eb9697033b728c1d56de9ecc2386e3974c8cc SHA-256: 7a6aa94efbc58c48be24ff74370fa24c8ed127a11b43b52ce7610d9efc887190
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://xezojetit.ru/strik?utm_term=english+grammar+test+software+free+download+for+pc PDF link annotation
    • http://newoxoxi.mywebcommunity.org/66986592986.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/honda_rebel_300_price_in_india_launch_date.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/94053225664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5feb72d60e24b.pdfIn PDF document text
    • http://memiwuv.mygamesonline.org/quality_management_system_definition_iso_13485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6046ebe217993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443574/normal_603a01f775000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_6034c8c78ff2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_6019f24aab54a.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/28b773ca-65e5-411b-b02e-dafd9fc8c009/gapizamilijugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3da3d2-a076-48e7-b6f7-874efc43b878/how_much_does_a_used_cessna_182_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c268dcf-9acb-4db5-bd14-832e77eaa023/bujubanotaximo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8868d8b4-cda8-4417-91b5-bdb4fb2b8539/neserusopijizaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c3ab1f-0f49-4d94-a3d8-416e98ce963a/kenmore_elite_canister_vacuum_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e214fc2f-259a-4337-90bb-b09e59be9b75/harry_potter_books_illustrated_pop_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcd4208-b30c-4597-8f9a-4c1a912b97fe/bitifiwisap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f898173-25e4-4b88-8ec9-3ce705812525/what_is_the_best_obd1_and_obd2_scanner.pdfIn PDF document text
    • http://fidikaxano.myartsonline.com/11304718251.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/fenasixevuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46996b06-2923-412f-a79a-1ef27d6e855e/31513447146.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_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 5620 bytes
SHA-256: 5f7802cf921e35188230169d92e5f00862670ed8e9833727cc5b87885a98cfc3
font_01_sfnt_off0000fd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD63 11172 bytes
SHA-256: 98a2479c97fd636917581cfb848714a2f0ff4f21740f4dc018eb9d0546fab5b9

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