Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41fcf726072ccf0…

MALICIOUS

PDF

83.9 KB Created: 2021-03-09 09:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bc4ab3320fd546ed31372662ddb28bae SHA-1: 3d61566ef90345ed4c90f8bfa69b4a32961f8dff SHA-256: c41fcf726072ccf014014d9388ff5231afa150a1da002620de50ad3325d35c75
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 0.9996

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://jottigo.ru/123?utm_term=mousehunt+burroughs+rift+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393503/normal_60028e2a21307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451563/normal_5fdbb062babec.pdfIn PDF document text
    • http://monanuzusud.22web.org/tp-link_wpa4220kit_av500_wifi_powerline_extender_kit.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/predator_generator_4375_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5fe48c2af0e4b.pdfIn PDF document text
    • http://yildirimotobursa.com/30092104450xel7s.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_use_mini_keurig_machine.pdfIn PDF document text
    • http://zibukebolavor.22web.org/49546397521.pdfIn PDF document text
    • http://xruhdfo.site/wheelie_motorcycle_gamesc6z00.pdfIn PDF document text
    • http://normaa-id.com/amnesia_the_dark_descent_ita_pc8d8nk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5fc7d5c7d0498.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/hhbgjfP/gunshots_sms_ringtones_zedge.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/bLgdKMJ/mezokaxojozilipiluxuduji.pdfIn PDF document text
    • http://netusikofigo.22web.org/is_guided_a_word.pdfIn PDF document text
    • http://weridif.medianewsonline.com/theta_healing_training_online.pdfIn PDF document text
    • http://afterdealer.pro/the_joy_luck_club_book_characterswc2oe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499300/normal_601af35d3a089.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://wafubarig.epizy.com/fapurujagopu.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/tenra_bansho_zero_espaol.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/78395765448.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 4956 bytes
SHA-256: 0f4f97c047b27286c94f09bd541dc12c9f860d522f0181e5db38fc02ed017335
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 10620 bytes
SHA-256: f922fb1b07a923e8facc9725ee9c2ccc8387758edf52ee5dd9a90ed76b324fe4
font_03_sfnt_off00013372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13372 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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