Malicious PDF — malware analysis report

Static analysis result for SHA-256 314fa3b403f4d5a7…

MALICIOUS

PDF

86.7 KB Created: 2021-04-08 05:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 297ab0aae8c93b7be3f36290e529a4c1 SHA-1: 126ea95cea4f23ba58a5904ad58822c9b36dc6ba SHA-256: 314fa3b403f4d5a7cbd977974357d9757c2e78e580b4731589921bdb58b6a55b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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/wix?keyword=xfinity+tv+guide+panama+city+beach PDF link annotation
    • http://waverufusufafuv.scienceontheweb.net/kekofuva.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/metabolism_of_bacteria.pdfIn PDF document text
    • http://retys.space/johnny_depp_don_juan_demarco_full_moviecqf9i.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/42471534631.pdfIn PDF document text
    • http://coloradocustomelectric.com/hoover_proheat_pet_carpet_cleanerpllch.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/xatiburewukud.pdfIn PDF document text
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/5089086.pdfIn PDF document text
    • http://love-your-lips.online/chevrolet_cruze_2012_owners_manual8mwjm.pdfIn PDF document text
    • http://lojasamericanasbr.com/derodugutunojazemhldj.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/69556290e.pdfIn PDF document text
    • http://buyfastedcircle.xyz/6646426212zng0m.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/f454b088-2b4e-4e4e-868f-3bffc8dcf1ed/how_many_calories_in_a_medium_french_vanilla_coffee_with_cream_and_sugar_from_dunkin_donuts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6aec1b-d92a-4e8e-b528-2b1c9b39a7ec/the_fall_of_the_house_of_usher_movie_2006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbeba9e-4f7f-4518-82d9-ec5cc3c4182e/50918691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ab45c4-3000-4f1a-aaf2-2c3faba9944e/kuseposiraxig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dfdf22f-0569-432f-b471-b34c205c10f3/materias_de_historia_que_caem_no_enem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307c6c0c-91bf-4a37-a8a2-c4d95ca86183/the_maze_runner_4_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12eda216-0edf-47e9-9aa6-91091e13d675/rogelemefiwonosawubekejon.pdfIn PDF document text
    • http://peledopa.myartsonline.com/aprendizagem_significativa_ausebel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1affa8-2353-4b98-879e-8d5152607bf6/31907748850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c85ca0-813a-4596-9608-4253588eaa0e/petsafe_underground_fence_wire_depth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185a7670-7bba-4e2f-8e00-df1f8d2c8da4/94435392391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086583e3-bc9b-4312-8731-0686a5a4670d/how_fall_in_love_with_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbcd1fe6-35c0-40c8-876a-1f14f33b9a9f/is_evening_primrose_oil_good_for_skin_and_hair.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 5540 bytes
SHA-256: 9195cb11d65bdf6e1509a0404dfb41fcd7c69f4f995c7b24f8e9a254649d5dbe
font_01_sfnt_off00010f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F89 11380 bytes
SHA-256: 57add9ffa219028f583c8767e1af138a359f91f6400d53c626a12b2b4daf013d
font_02_sfnt_off00013678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13678 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d