Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37cff260c10a381…

MALICIOUS

PDF

70.7 KB Created: 2021-03-12 12:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 36b7ed71209dcc0b75cae50195aafcd9 SHA-1: 19cad750c7d2dd990bef8c5a9d688bb43642e715 SHA-256: d37cff260c10a381ec9c6cb7640f7043f3f0f7c12b53f03fd539aeb433b9ccbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL, 'https://lozipotod.ru/123?utm_term=bazooker+better+life', identified as a potential lure. The PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=bazooker+better+life PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473031/normal_6004d7bb79d99.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/how_to_draw_anime_fast.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/99005687383.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/69946668248.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/Sbidig6/99351038219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5ff983542491f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_603d9066a3a70.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/Nhdmijr/craftsman_building_craft_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fcaf985885c3.pdfIn PDF document text
    • https://cdn.sqhk.co/xogiwusumo/fUhiAhi/15874230097.pdfIn PDF document text
    • https://cdn.sqhk.co/zisenusaf/bighaIR/kopidaxoseved.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_60430ba80836a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sisaxu/why_is_there_no_sound_coming_from_my_element_tv.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_85f1a03a75344ea3a42442031e5ede1a.pdf?index=trueIn PDF document text
    • http://taguloxutenafol.myartsonline.com/how_much_should_a_screenwriter_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e7e11b-af03-4a00-b984-94fbf9507a91/black_hawk_down_the_untold_story_rotten_tomatoes.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_ecd22d13500f4799a5cbaacdf4a57c5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujinit/charterers_liability_proposal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/how_to_change_my_wall_street_journal_subscription.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/chunk_alla_chunkidippane_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91dc275-01da-4e98-afd7-448911281ed1/16514566028.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 4568 bytes
SHA-256: 7414c03502d9c31771fc1b2dc478727c176b696be6ba6f12c6d7160058682d72
font_01_sfnt_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 9724 bytes
SHA-256: 91ea800425eec963ff87d54df105e5b848e6d625f97e88becfe0417ae5b8ba73
font_02_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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