Malicious PDF — malware analysis report

Static analysis result for SHA-256 db38c02b460ac7c3…

MALICIOUS

PDF

79.1 KB Created: 2021-03-28 10:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c7d98496061b9ac866aa6a75f967947a SHA-1: ee584516f66be5bf1d04ce34f2de94ac11d6efc2 SHA-256: db38c02b460ac7c34e4cb7ebfef8cca27d08416a42b90c59bd8b6b795e836b4a
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 0.9993

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://xajibur.ru/123?utm_term=hedge+fund+research+industry+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd3a44b1f9a5.pdfIn PDF document text
    • http://telgrm.site/lelemivedulevifiro5l263.pdfIn PDF document text
    • http://randname.ru/75478367398knstk.pdfIn PDF document text
    • http://girlita.space/kekosaginovavupegid9k3if.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_6017671d17783.pdfIn PDF document text
    • http://load-bcp.com/vojefokuzinosevunenubiffsqn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5ff2941e4f8ec.pdfIn PDF document text
    • http://bellissimo.online/foletugimawakeroky58f.pdfIn PDF document text
    • http://ca-manalapan.space/the_island_castaway_lost_world_chapter_6_walkthroughi1y4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474457/normal_5fff138a9f893.pdfIn PDF document text
    • http://checkmycredit.info/best_international_finance_jobsfau4d.pdfIn PDF document text
    • http://mebelrostov.ru/how_to_access_my_cloud_home_public_folder4kfn6.pdfIn PDF document text
    • http://astropsychology.website/how_to_install_diono_radian_forward_facing8st14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5ff49bc6a9b67.pdfIn PDF document text
    • http://telemprom.xyz/10164978887x5acb.pdfIn PDF document text
    • http://titoto.xyz/bomotipebe7i7w8.pdfIn PDF document text
    • http://shop-profildoors.ru/why_is_my_internet_blinking_orangeotf3r.pdfIn PDF document text
    • http://net-klientov.ru/what_should_i_do_if_my_pendrive_is_not_detected_windows_10i8qom.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/dixaleko/77142147707.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/tewoxibilubam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f229e7-69bb-45b7-bd15-178133b538de/memiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289a3fc0-02be-4ec2-9288-6a55da25c7ab/frases_filosoficas_de_la_pelicula_el_mundo_de_sofia.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/rikutonedokadidazope.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/rowakuwitajilorimasiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce32cce-2b14-4245-ac4a-32771a294106/how_to_cancel_wsj_wine_club.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_off0000f753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 5448 bytes
SHA-256: 05d10a3cc41de22a1aeb10ea2c305c7381628c9fe0374392199d7c35220c74fd
font_01_sfnt_off000109e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E5 10784 bytes
SHA-256: dd6d634a966e261bc743190c2b9c913d77a2936bca907c3f76b275aeabf01c71

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