Malicious PDF — malware analysis report

Static analysis result for SHA-256 02416643533cf711…

MALICIOUS

PDF

91.0 KB Created: 2021-04-05 14:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7b87499725e1560e3de0f564ff7cf60b SHA-1: b79ebd0f79efd9ff68469b67d15da4e8d87cf70a SHA-256: 02416643533cf711aed71a16a8b8be029a173b33d5e2d973bb73f83e228a16e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are consistent with a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=que+es+el+islam+y+que+significa PDF link annotation
    • https://cdn.sqhk.co/divojimo/J3jhhLq/3102877005.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/ghhhi6d/city_sports_shoes.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/sony_bdp-s570_firmware_update.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/2oKMjcz/44506423538.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/moonshot_the_indigenous_comics_collection_volume_3.pdfIn PDF document text
    • https://cdn.sqhk.co/dosijowikul/0ighbRg/arbeitszeugnis_formulierungen_schlussformel.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/xurukaviw.pdfIn PDF document text
    • http://pijaparafagime.iblogger.org/pizupuxexojima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/90166091612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc825ecf-1b30-4064-8685-b2fe804ada5d/nepugagoxowivuwukela.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/phpstorm_share_live_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7ab003-87fc-4ee3-9076-3564c61f3a5b/how_big_is_30_cm_in_feet.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/56524540331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6205c8-7c74-4f74-98e3-062f91db257d/tekowegeguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b34349-3e37-4b9e-a98e-d1381c41928b/89167741964.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/monster_2014_korean_movie_eng_sub_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed565b1-8215-4d4a-9204-4c646af36b58/100_deadly_skills_combat_edition_hard_copy.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/how_to_use_dish_hopper_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c12411-d248-4c75-a238-2cd1a5a9d7e5/46609420621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09016d75-ff54-4160-b57e-f529edcecfa6/omron_h3cr-a.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/judoxunixasumipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff6123b-c9c2-4674-910b-8cc36e840f2f/myers_briggs_type_indicator_personality_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bb4d43-48cc-4188-a518-5b9d328ee8a7/how_to_make_a_bean_bag_toss_carnival_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d03e2e-6a4f-43cb-9c0d-c575fe49455b/rigubelerakevozubuto.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_off00012363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 5392 bytes
SHA-256: 652c8cefd41b367f9a997489f7e6a99cecb52605318406170461cc3963ba7e6c
font_01_sfnt_off000135bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BF 12244 bytes
SHA-256: d3cec8f4c23d5d8e8b3102cbe96812f51f3ce6b26d8b4c305f7ea99062e90f03