Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08a1f92d0ce611b…

MALICIOUS

PDF

95.1 KB Created: 2021-03-19 01:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89eaf63a10278249593e1cedbf68ae24 SHA-1: e884b44fd8bd1de6e8c54e9caf4864d48c15de3f SHA-256: c08a1f92d0ce611b34eff38a35bcbbc3c119e87da939763b8f1cdb6c82aaade1
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 0.9988

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://crophysi.ru/wix?keyword=the+hitchhiker%2527s+guide+to+the+galaxy+movie+1981 PDF link annotation
    • https://cdn.sqhk.co/tipefima/bfhg2hv/weekend_at_bernie_s_cutout_in_stands.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/97874853683.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/bQ5lLf7/real_steel_robots_name.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/gray_s_biopsychological_theory_of_personality.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/cathode_ray_tube_experiment.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/ifcighc/block_city_wars_pixel_shooter_with_battle_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/bhbZgfo/main_approaches_of_behavioral_objectives.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/giHjdpx/air_traffic_controller_requirements.pdfIn PDF document text
    • http://rometinanuk.iblogger.org/65393199640.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/93614907584.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
    • http://zikimopotefeva.epizy.com/frogs_into_princes_richard_bandler.pdfIn PDF document text
    • http://palezonipegodaf.epizy.com/48318133608.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/the_prayer_of_jabez_audiobook_free.pdfIn PDF document text
    • http://gajamozaxekega.atwebpages.com/bu_jhansi_admit_card_2020_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/architectural_graphic_standards_free_download.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/how_to_get_the_average_atomic_mass_of_an_element.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/film_the_amityville_horror_2005_indowebster.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/35702520420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f51fc2b-4c0e-4e7e-b52a-c1bf9378ef7b/ergobaby_omni_360_review_singapore.pdfIn PDF document text
    • http://lironif.epizy.com/37467722771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c50766e-5bec-4135-aeb3-a1b34537c40e/31813865703.pdfIn PDF document text
    • http://runugerobel.rf.gd/feasibility_report_meaning_in_sinhala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf35192-8c97-47ca-b34f-3f44b7a654ef/tamasid.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/civil_engineering_companies_in_atlanta_ga.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_off0001271f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 5808 bytes
SHA-256: 55a093eaa48a064b213ac2342e15a9d248e24d80de1accdff7a00e6922495e49
font_01_sfnt_off00013b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B01 10948 bytes
SHA-256: 1dfcff6610731463040b5f6e607739b039c7f6b10dd1753ac0f8b13797ef7e95
font_02_sfnt_off0001605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1605D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3