Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2352e40ef5b456d…

MALICIOUS

PDF

76.0 KB Created: 2021-06-01 02:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: abd03ccdda02e63a9c8177349bbb4fdb SHA-1: f1c251c93fce86e80a1e4999a7b126bf6309ba22 SHA-256: d2352e40ef5b456d599d45b687f337467d56a2da7711a059dcabe73711109506
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to presentation templates.

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://queure.ru/pbw?utm_term=template+ppt+sejarah+jepang PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6068522f55e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5fec83698e01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_601fb91a58c47.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://visetululiv.pbworks.com/w/file/fetch/144422331/can_a_washing_machine_timer_be_repaired.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/what_is_an_example_of_nonverbal_communication_conveying_impatience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541997ec-b3af-407a-b337-6ffe19d7d95e/jepixebiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd197224-3e02-4fbc-880f-4ba53505b9ec/jifizixajibedonig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab16270-81b4-4513-bf54-78f43f94b2c8/38911731112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd08663-c380-4e42-bd6c-83c8299e39fe/2209164975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b10091-8ed2-41ba-96bb-6c97a51767ed/biwanesibenunugudinefu.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/gaduvuvaleduzijukerilol.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144428469/rockshox_monarch_plus_rc3_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/396c4f4e-254f-4605-bb21-4046dc6522d1/61139928005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323ddc5a-518d-40ef-8a4a-7105da5b2caa/gabuwulerififovaj.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144420303/hijyen_eitimi_sorular_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93422db-fb26-48ca-8d05-56be49012dee/elementary_differential_equations_and_boundary_value_problems_solutions_manual_chegg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4538beac-c549-4c73-9ac4-b01f8a9d5bfb/beluwexizi.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/cen-tech_battery_charger_4_in_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e68126-0d19-4cb9-97d5-fb5a6cd778aa/what_battery_for_chamberlain_garage_door_opener_remote.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/74404928780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf148572-a577-487c-806e-2257cb919786/42493071462.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF64 4888 bytes
SHA-256: e032bd26b832fe6137ffcb04ed9dbbf87d373eb6e2c258c6d57c0df452a1cbc7
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 11028 bytes
SHA-256: 78e26b67b05f19ce9d5dd3ce33f8030ade996cdb1586d765e473cbf718db7b89
font_02_sfnt_off000114c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3