Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e61034c46f5b14…

MALICIOUS

PDF

74.7 KB Created: 2020-12-25 23:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e79b853af4db3f04982a9b1fb27b5fae SHA-1: 7ea7b443597249b2d4c65b7984d2996eb664f362 SHA-256: 31e61034c46f5b145eba649d7fc7f713344f652530c58750681ed48cb84f3154
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical finding that it links to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Vlookup guide excel 2010' to direct users to the malicious URL. The presence of numerous external PDF links further indicates a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=vlookup+guide+excel+2010
    • https://cdn.sqhk.co/sepunaro/jgjLNFl/xotaw.pdf
    • https://cdn-cms.f-static.net/uploads/4409811/normal_5fb5c3436440c.pdf
    • https://sogovowezop.weebly.com/uploads/1/3/4/3/134324678/lodinoluzano.pdf
    • https://cdn.sqhk.co/kuruwoke/drjjWfL/fnaf_3_fan_games_scratch.pdf
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fc6b34a9189a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tobojelusiwi/cours_de_l_automate_programmable_industriel.pdf
    • https://uploads.strikinglycdn.com/files/86b6cdab-898a-4770-b279-73636632e46e/aquatech_5_15.pdf
    • https://uploads.strikinglycdn.com/files/7f7255db-94ad-4f7b-95d8-a30f0e46bec4/battle_for_the_planet_of_the_apes_unrated.pdf
    • https://uploads.strikinglycdn.com/files/eee2ef7c-4505-46bf-bf3f-eb9defc852a4/bomeru.pdf
    • https://uploads.strikinglycdn.com/files/a601edc5-ed3f-48fe-9879-7fc7ce829b1c/begalifeja.pdf
    • https://uploads.strikinglycdn.com/files/c3498de8-6019-4895-b9cb-cce65a7f0c4b/interview_questions_to_ask_thomas_jefferson.pdf
    • https://s3.amazonaws.com/wizedumi/facebook_cover_photo_templates_for_business.pdf
    • https://uploads.strikinglycdn.com/files/a8932f26-bba3-48ac-838d-37aa46631f2e/new_england_colonies_geography_climate_and_economy.pdf
    • https://uploads.strikinglycdn.com/files/df02baa9-fade-477e-8c02-f16d0305b11e/96122898906.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94a.bin
01163d37e087bafa3bd5c74b00a321f6919ca1f857aebd92096f743a9be1620f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 4876 bytes
font_01_sfnt_off0000e9fb.bin
1c9cbd14f35904e67b96e19a7897cb11d69ecb12c8ff121c95e7167bc3ebdd31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 11100 bytes
font_02_sfnt_off00010fe2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.