Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3d3e89d95a8061…

MALICIOUS

PDF

88.8 KB Created: 2021-03-29 14:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 17714b8f41843333ed3d1ddbf9534701 SHA-1: cbfba0c997473809a91b5e96ea9b19ef40785e32 SHA-256: be3d3e89d95a80619d0955713ef1a2af73dad6c79f59b408157fcbf8debcebbb
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 0.9997

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://gimoguvi.ru/wix?keyword=electric+circuit+calculations+worksheet PDF link annotation
    • https://cdn.sqhk.co/mepapogivoma/hM1WZgh/birdies_wings_menu.pdfIn PDF document text
    • http://hotgirls.host/zujupisowikszkmo.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/fBwrWhe/8901458574.pdfIn PDF document text
    • http://rubka.space/60320964401hm4cl.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/habjhgi/university_of_miami_football_coaches_directory.pdfIn PDF document text
    • http://legendarycraft.ru/paboxanosufidotibozuxukso14b.pdfIn PDF document text
    • http://zoosalon.org/case_22_international_business_machines_ibm_corporation_20154qk2z.pdfIn PDF document text
    • http://idealslimitaly.site/31646667729dzkd9.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/chcjici/3d_maze_mario_rpg.pdfIn PDF document text
    • http://winclean-shop.space/coleman_mach_rv_air_conditioner_installationo5bue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477651/normal_5fdb374b19076.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/BjgjbyI/zulozoxu.pdfIn PDF document text
    • http://fitnesspack.net/tetavejavonuvemujotovidmcc78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_605b79da84fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_5fd6a95b26036.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/8eea28d6-ad61-4b5e-a1c0-73c237581681/5_things_in_a_healthy_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44d7b83-cc05-4bed-ad2d-1d36310b81e3/ap_human_geography_ap_exam_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5055f89e-ac37-4c9a-862f-4bac6a4f8ffd/serta_motion_perfect_replacement_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be668eb1-5e5b-4305-974d-e85d075e40e5/how_to_move_castling_in_chess.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db46bddb-157f-4a65-a844-0be1757fc7d3/43648457993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8de0f5f-ea40-4be4-b8b0-ab26f6bf53e4/frigidaire_affinity_front_load_washing_machine_manual.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_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 5000 bytes
SHA-256: 2900de8157e63f7638be7fd2c900655d41ae9299c333072531e6aac956f04be4
font_01_sfnt_off00012fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC4 11184 bytes
SHA-256: df2a94f76571096aadbc61caae1745253c163efc68a46872ba888340328e3fdb

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