Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2485f0ee42be5c…

MALICIOUS

PDF

78.9 KB Created: 2021-03-13 20:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ef37d1128215746dd9655f48cf70c4b SHA-1: 94c0a7ff8a5a9270d3e1394531dfbaedb177348b SHA-256: fd2485f0ee42be5c3b26d2a447b05bd4451528e5bebb2655692c5e360994d864
186 Risk Score

Malware Insights

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

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 0.9950

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=intek+v+twin+oil+capacity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454438/normal_601520c05a5eb.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/jaijjig/gevisobunomosalajufevu.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/eOhi5rz/4_pics_1_word_level_2277.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/jDaScij/my_little_pony_magic_princess_friend_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_604b8354734ae.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/dhgQrPe/13480060343.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/loxidutudetofebakosup.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/snghiha/coin_pusher_machine_for_sale_ireland.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/ladutudivamobedafojemu.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/vSekhgh/odd_eyes_performapal_deck_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/ghCtUii/50825097560.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/blues_guitar_unleashed_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/iXrl7t0/school_app_college_management_committee_limited.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/6hAR1wN/28080863086.pdfIn PDF document text
    • https://cdn.sqhk.co/foligezuli/jbXhcgf/island_tribe_2_artifacts.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/igrK9vK/pocket_build_ultimate_sandbox_building_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/9hghji3/truck_wallpaper_android_hd_joker.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/guxurepilavivuwigimuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/gjiifjj/xfinity_stream_on_amazon_fire_stick_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/az1iiZQ/english_grammar_worksheets_for_grade_4-_adjectives.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/jb3ghhg/64626946625.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://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_a8e8a821bcf2402da12bc265996193a5.pdf?index=trueIn PDF document text
    • http://sasaxunofob.atwebpages.com/biopsychosocial_model_of_mental_health.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_bef160f0ebb4464ca456a9492caec413.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_c9eccb30c8104b908fe93ca2ed43f995.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_b02fcf0519e6484291cb0f0c5a818f83.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_4f20cb87531240a6aeee9bc7e6afd78a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 4696 bytes
SHA-256: 9d41fa147d57d3cc4d309de333466539e55ae44be60a728ec1acaed27324d72d
font_01_sfnt_off0000f92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92C 11372 bytes
SHA-256: f66f807f79990357b6a5be84c7f325357473ad2fdce272aba70873d95468abe8
font_02_sfnt_off00011ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3