Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ff92c1b6186e20…

MALICIOUS

PDF

71.5 KB Created: 2021-05-02 14:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e508d266a2822f76c03043e21aeb2f02 SHA-1: 126848e7e4f5c72d95ec34b5d283ee8b0454bacf SHA-256: 74ff92c1b6186e2050c69ddd73d2be7ca7fb22b174171d9328bc6786d6ff61d4
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://lozipotod.ru/strik?utm_term=variables+and+equations+worksheet+answers PDF link annotation
    • http://xujadisilizaw.iblogger.org/protein_structure_levels.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/codex_orks_40k.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/gift_of_the_magi_questions_multiple_choice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6035062c04bb1.pdfIn PDF document text
    • http://wegansit.space/acorde_eb7_pianomdrst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_6013c55414cb1.pdfIn PDF document text
    • http://help-bluebadgecenter.com/mewazebenafutufedobax04x5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5ffd607c9fb02.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/35507034506.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/typhoid_fever_in_pregnancy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvawegudisow.epizy.com/fepuxebit.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/tatupabofopalejire.pdfIn PDF document text
    • http://bobofawas.rf.gd/fx_991es_plus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/plantronics_cs55_handset_lifter_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/conflict_management_techniques_in_project_management.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/35168952573.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_09635ed13e1d427ea883376c7afff2ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/states_and_capitals_of_india_2017.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_df71c3c5d72346fa9c83dd0da10cda36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/linux_programming_language_hai_ya_nahin.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_afb2690d03874c45a62e57e329d2b773.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_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 5300 bytes
SHA-256: f2b34ee9f6782d89bb5dec916835c014b922afd087e964b9012892b8ffda3901
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 10084 bytes
SHA-256: 96bcf00a146a0414c87b295edd793d3e764baf451e2883033a255576bfda9f5e

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