Malicious PDF — malware analysis report

Static analysis result for SHA-256 91741be924b98784…

MALICIOUS

PDF

72.7 KB Created: 2021-03-25 13:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58f605f9a79fda99c4d442e01694806d SHA-1: 1cccc15291fcb5511009dea39b0461da763f9515 SHA-256: 91741be924b987843df84130b5614357e225e8812dd3474a2e6e28d3d6385565
126 Risk Score

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 0.9995

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://dugedepap.ru/wix?keyword=odysseyware+algebra+2+answers PDF link annotation
    • https://cdn.sqhk.co/ridasozewe/iggfO5J/mule_deer_hunting_guides_wyoming.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/Agfihgh/vexujixuvawes.pdfIn PDF document text
    • http://meinekarten.best/jeep_cherokee_shop_manualbaglg.pdfIn PDF document text
    • http://realnoe-obshenie.online/emotion_thesauruss8c26.pdfIn PDF document text
    • http://tameenegypt.com/certification_lpic-12ju39.pdfIn PDF document text
    • http://tamakar.tech/familiar_5e_guide5inta.pdfIn PDF document text
    • http://amsidgi.xyz/me_divierto_y_aprendo_3_respuestas_gratis79zcx.pdfIn PDF document text
    • http://snail-case.store/tom_sawyer_island_disneyland_deathuw9uy.pdfIn PDF document text
    • http://m-ryanaf.site/razor_e200_electric_scooter_parts_diagrambyce7.pdfIn PDF document text
    • http://proita.fun/thought_process_meaning_in_marathidgl4i.pdfIn PDF document text
    • http://8bitbeardsco.com/diamond_sutra_full_text2ds32.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/small_merge_split7y2tl.pdfIn PDF document text
    • http://sis-paypal.com/chicago_manual_of_style_annotated_bibliography_exampleafylw.pdfIn PDF document text
    • http://brumbum2.xyz/sheet_metal_gauge_to_thickness_chartbm01v.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/5ijZjcl/learn_spanish_free_spanish_word_of_the_day.pdfIn PDF document text
    • http://stakingyfi.com/latawixarov95li.pdfIn PDF document text
    • http://brumbum6.xyz/altec_lansing_mini_lifejacket_jolt_with_lightslbfvx.pdfIn PDF document text
    • http://kuxni.su/the_pursuit_of_god_aw_tozer_kindlecfdpo.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/ribowexulo/sonar_x3_producer_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/ziwutapigogopu.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/heel_pressure_ulcer_prevention_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/37559169428.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 5036 bytes
SHA-256: 7b7fb56d51e5c8fe949a8ef756a77871086eef6af7c4a907edfcc5d391f1af8d
font_01_sfnt_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 10728 bytes
SHA-256: 2c3a2460d7b82c25d7dd6eeee77e0e301da96c6d71cf9dea2f84d7f9660b6f48
font_02_sfnt_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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