Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0d759312c93f63…

MALICIOUS

PDF

69.5 KB Created: 2021-04-06 16:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c11a403aff4d5ca9fba7936b1da5fb2c SHA-1: 64212ac94eeab8e6df8ed1101633ffcd6a690b33 SHA-256: be0d759312c93f635007b6228a7f7184c751dd3b57ed3d3e0c86111a0db33469
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to host malicious content or redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The document body, though heavily obfuscated, contains keywords related to manuals, suggesting a lure for users seeking information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=weider+crossbow+legend+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470035/normal_601dc9c9b8d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_60699036b692e.pdfIn PDF document text
    • http://qlemelest.online/silalid7kph.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/what_is_the_irwin_family_net_worth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_604d20d5a7010.pdfIn PDF document text
    • http://lnstagramoriginal.com/is_fisher_price_jumperoo_safe833hm.pdfIn PDF document text
    • http://skidki-day.store/jilaloligijexipamibbu6pu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_60597b72c10e2.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/51871571186.pdfIn PDF document text
    • http://yourcy.com/deluweboxaxinifekapidikidqye9.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/4064bf7f-3db9-4a2e-b1bb-816ed3f961f6/53858062984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cb78a6-c07e-4b7a-9360-a0642706b144/programming_in_c_notes_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50c819c-7b93-4a0c-8800-0defaaad64e0/dirt_devil_cordless_stick_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/template_curriculum_vitae_word_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05de4e4e-e7e7-496c-b1ba-f0ab6102ed11/1554015488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0f6aec-c52f-4769-bded-1ebdab71e62e/how_long_to_cook_a_stuffed_turkey_in_an_oster_roaster_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843f28e3-0f8f-401e-8a43-50f7475a745f/cheats_in_warcraft_3_frozen_throne_pc_local_area_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26465a8f-692d-45a0-87a7-29f01c30dbe1/first_and_second_estate_french_revolution.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/17967333601.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_off0000d3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A6 5504 bytes
SHA-256: 9b31c2f5ece9fb794f0114430a3a119fd3c53a14f5e2cccb2ed00c1123fe52f5
font_01_sfnt_off0000e65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65D 10140 bytes
SHA-256: cba8981900e2bb8172daf3916ca3350137864235060cfee27e97aaa4e6259de5

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