Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04242c72c715fcf…

MALICIOUS

PDF

90.0 KB Created: 2021-03-18 03:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1efa64d22ad42a21e525176ef6e339d1 SHA-1: 527dd873ff110db7a0138f1ca6f158a65cab76e6 SHA-256: f04242c72c715fcf668b3edfec077c84ac70a1d385918a1a907e99f6b680b31b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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/123?utm_term=free+pastel+accounting+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/notizejamebo/adRgcoO/mansions_of_madness_second_edition_investigator_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/milagaleja/ijc4h02/mutant_creatures_mod_new_mcpedl.pdfIn PDF document text
    • http://vk-settings-change.online/reading_like_a_writer_francine_prose_summarycu890.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/NfaXhiy/kigojokolukobijavaxeduwe.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/KsjhLhg/jamosivurutezizeliwe.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/dFWijxA/car_crash_test_simulator_3d_leap_of_death.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/563968692187e5gh.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/85055143154.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/CX4hhhg/chest_sim_for_clash_royale_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b373c352-f49a-4487-b014-8361bd99aca0/navien_ch_240_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5767b7-9172-44cb-8fd9-fcbb41ee22c9/craftsman_table_saw_motor_brushes.pdfIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_1801d14a09b7445d847415954ce30ff1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6488b33f-1411-443d-8a07-4004be761e1a/text_twist_free_online_gamehouse.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_82e1c79333d54c32bce34dc2add40d95.pdf?index=trueIn PDF document text
    • http://vawanumezal.onlinewebshop.net/31975195252.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_a564ada5bdd64248ba461b85bf089272.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d9fdb1-ae8a-4212-9ac6-94c8f2b649dc/you_can_see_meaning_in_hindi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 5276 bytes
SHA-256: 83bd54ae9251663e8f4cfbb1353311ab044b746473a7fcda1036b2d3c3987a6c
font_01_sfnt_off00013335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13335 11648 bytes
SHA-256: 6db979cff07c5ef087e00ab6bce6deec10d309f52c682ecb11a42063d83b3e1e

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