Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5901de724eeca6b…

MALICIOUS

PDF

78.1 KB Created: 2021-05-12 10:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2abd91e4dc84721b627f230121ea12c SHA-1: d6598c766b0c64b2b5a91022cdc3b148a3ecf7cf SHA-256: d5901de724eeca6b19ee10ed971fae94ecea29ce8f829554fc087b68ffd270d9
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=how+to+avoid+fallacies+as+a+student PDF link annotation
    • http://torchqbfl.fun/menipawuwepoth7.pdfIn PDF document text
    • https://cdn.sqhk.co/zepinima/rgdiagd/pixel_world_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470968/normal_5ff3ab89dfee1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393186/normal_5fefe7187d47d.pdfIn PDF document text
    • https://cdn.sqhk.co/zezugiwetibe/epheghw/71700284468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5ff1402fd9a20.pdfIn PDF document text
    • https://cdn.sqhk.co/parepejapoki/fzhjIif/pimiwenamuforolimariza.pdfIn PDF document text
    • http://sale50.pro/wekamamenusimubovesepubx1jl.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/airtel_digital_tv_channel_numbers.pdfIn PDF document text
    • http://setofexperience.site/nepijoraxamobagfk58p.pdfIn PDF document text
    • http://workmonster.net/diablo_3_necromancer_pet_build_season_21p41wt.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/Y8Q8tiU/launcher_wear_os.pdfIn PDF document text
    • http://blu-ital.space/62833706733qkegr.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/gey0ijX/basketball_world_rankings_asia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_601dde7fbc9bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_f0404048b8a8436280153a68201d72ca.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_32f0030f1b03424fb65d127511ee4cbb.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_261e9d3d29f847448800677981d15d5f.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_a8f6755a0c80484eb8d87b05464ac004.pdf?index=trueIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_0f4e5df548c24a80a19681032db458fb.pdf?index=trueIn PDF document text
    • http://zewadomi.myartsonline.com/98279386840.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/98132191789.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_2a893b5ad07249b0bbd48a57aae97f15.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_aaa2bcd68e4e4b609b6cc5a1aa843885.pdf?index=trueIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/botanica_agricola_libro.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_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 5032 bytes
SHA-256: 75e3405fa1e413f558163a2d57de2dd9bd2df584132236691048fbf69c0d4552
font_01_sfnt_off000105d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 10844 bytes
SHA-256: a06b4b4cc8b4584897536e43e722acd85c8e981f9f8bdf32b0d6897982da1873

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