Malicious PDF — malware analysis report

Static analysis result for SHA-256 82246dcfd36454c5…

MALICIOUS

PDF

81.3 KB Created: 2021-03-11 08:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8adfee1c85ac6ffdd6d477bbe52f3930 SHA-1: 56dde7d6c1aa71775694e085e5f68440453740a0 SHA-256: 82246dcfd36454c5cc4b62aca92dbec100f5c8dd22aedc329ed94f125c8f0580
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://xajibur.ru/award?keyword=hornos+de+atmosfera+controlada+pdf PDF link annotation
    • http://kupivse.xyz/94347386103x7ah.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_60275d0a2dbe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fff639a39675.pdfIn PDF document text
    • http://lazadacostumercenter.com/linear_piecewise_defined_functions_worksheet6mj80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_5fec0929a3fa8.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/south_african_song_20199yq3e.pdfIn PDF document text
    • http://pressit.space/computer_hardware_and_networking_in_tamilm06d8.pdfIn PDF document text
    • http://antinomi.design/john_deere_7000_planter_monitor_problems7bl15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zavonavefepibe.epizy.com/16100135355.pdfIn PDF document text
    • http://bofetotazefonuv.epizy.com/97043763783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9166ebb6-ee1b-4a83-a339-5b6cad404cb9/kenmore_oasis_elite_washer_error_codes.pdfIn PDF document text
    • http://bajejefi.epizy.com/dotomamesofewajotezakizaj.pdfIn PDF document text
    • http://folezazav.epizy.com/combining_like_terms_video_funny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1156af-f3de-444b-9e15-b62ea59c9942/37699980615.pdfIn PDF document text
    • http://kilibuv.rf.gd/bubawewusifuju.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/requirements_to_become_a_real_estate_agent_in_indiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d7e1b8-1c99-489f-9eed-54769605a42f/flight_sim_xbox_one.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/72041962480.pdfIn PDF document text
    • http://roxadib.epizy.com/avatar_auto_kim_cuong_250_android.pdfIn PDF document text
    • http://seromol.epizy.com/divuvexigixime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9e4b0f-34b0-436e-beb7-189f51a96d69/24631657788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3e261b-2bb1-4d24-b162-2b1670b935b9/99539038191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973331cc-9602-4b66-9154-34c1ab3a9e7b/do_you_capitalize_should_in_a_title.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ecf0dbf-45fb-4fc0-8686-7f8749501989/how_to_read_drum_notes_for_beginners.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 5260 bytes
SHA-256: 4af7b356f0c00038396da91fc56fa7175adcd1921255e87014e37e48328b688a
font_01_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 12204 bytes
SHA-256: d751c06cd95ad4a6342d98121b807c141bee5741e5dd7fe35365658c0c3a5e87

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