Malicious PDF — malware analysis report

Static analysis result for SHA-256 9302a6ab3eba9609…

MALICIOUS

PDF

81.1 KB Created: 2021-03-07 23:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85498cfe9e96739b55e2bfdbf5be800e SHA-1: dd644c1b2717964157df1f936276a9d44890036b SHA-256: 9302a6ab3eba960928b95c9966f6db64b952f95e7b174250a093bd9c845a2528
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=how+to+be+a+certified+behavior+analyst PDF link annotation
    • https://cdn.sqhk.co/kixarozikej/ifihiTH/radio_ascolta_anni_60.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/bGI58wX/43720183869.pdfIn PDF document text
    • https://cdn.sqhk.co/negixakozaxu/jahajdD/crossy_road_castle_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/ghchaih/movie_night_ideas_date.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/1a5e87.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/kumabamo.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/d4bd29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_60210311be309.pdfIn PDF document text
    • https://sofabavoxikavup.weebly.com/uploads/1/3/4/6/134636307/f5e8be6d3ce9535.pdfIn PDF document text
    • https://pigodebi.weebly.com/uploads/1/3/4/8/134864190/woganupoxodozuw.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/cjfinig/wrap_rope_end.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fca7ea9c39a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420224/normal_5ff985cf76a00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcedd4e4bfa8.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/jezaxojipevu/chale_aana_song_female_version.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_8e355022bab143e8936d090e8d68c745.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_ce70790805ff44b6bed0544b2fc19657.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/tangled_2017_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/jojarekuge.pdfIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_6adb60271e424e07a0f431e533b6e1d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7485f029-c865-493a-837b-b43076e2c5dd/what_are_the_five_goals_of_sentencing.pdfIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_600a897bcc494542afac8fe3ab27f4b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/013db6f3-b6e3-4f34-9882-c903a0110f6c/zinoje.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/2003_dodge_dakota_4.7_oil_type.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_off0000fae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE8 5464 bytes
SHA-256: 7ab1115e16b01dead8120579ac7c46812af0a7f20c6e2bc96ddb611b32f198dc
font_01_sfnt_off00010d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D92 11984 bytes
SHA-256: a09f8083b63377ea382fd0b51699ba7cc3cebb98ed0c694e370b1f20f5017859