Malicious PDF — malware analysis report

Static analysis result for SHA-256 114c9f4ebfa58fb0…

MALICIOUS

PDF

77.4 KB Created: 2021-04-20 08:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 54b309fa17fe7df6ac20c69e297903ed SHA-1: 749a8c28fe61dca579e415e57b36abce910ba279 SHA-256: 114c9f4ebfa58fb04804dbc038864992e25d7082191ead712bfb60a94a5cf20b
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 0.9991

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://soxebez.ru/strik?utm_term=my+house+water+heater+is+not+working PDF link annotation
    • http://igafnd.org/duck_hunt_gun_nes7p5z8.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/minecraft_guide_to_enchantments_and_potions_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/g8jfBgi/nfl_schedule_week_5_spreads.pdfIn PDF document text
    • http://znohist.site/xunesakebpqn08.pdfIn PDF document text
    • http://catsism.com/brother_project_runway_limited_edition_sewing_machine_ce1100prwekkz0.pdfIn PDF document text
    • http://znakomstva18x.site/cartoon_movie_website_named3pu5.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/sibuvawagerepuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/gigcifH/wwe_smackdown_roster_2005.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/mekoferawegolowo.pdfIn PDF document text
    • http://creditreportusa.info/29955081149yzehu.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/njhJggY/reina_theme_park_apk_for_gionee.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxazutiri/5TibGja/21385744730.pdfIn PDF document text
    • http://jugatilewe.22web.org/werewolf_online_beta_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojudemavu.onlinewebshop.net/what_would_cause_the_transmission_not_to_engage.pdfIn PDF document text
    • http://zabukek.rf.gd/dowivoza.pdfIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_f929174f2a514a2a95978281ad196ff0.pdf?index=trueIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_77aeeffecccf43dbb0f708c63ec41e15.pdf?index=trueIn PDF document text
    • http://nareboveridur.epizy.com/jimewogas.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_e0e42816dfa94b209f8897c25f4643ce.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_03c5731e9e604b008e84b237c8f78cd4.pdf?index=trueIn PDF document text
    • http://sitojedakolotil.rf.gd/vastu_shastra_in_marathi.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_a113b60863b64eb083414fa40398bf97.pdf?index=trueIn PDF document text
    • http://xadilopavut.myartsonline.com/free_garden_shed_plans.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_503cfc67704c49a5ab6da69d3096ebbe.pdf?index=trueIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_f030d0f460334ddca78f9670d8e30ac9.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_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 5180 bytes
SHA-256: d707734d61bb4094e268e58cc87fcc5aaa7671a98aa9c0c83866e7a5de513680
font_01_sfnt_off00010417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 10476 bytes
SHA-256: b0802fbbf730b13a9308afc448813691dc33779ef2a36fad572514401f639e1c

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