Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3bfa864e357c99…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 03:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5fc42dbc0c550dfd8dfc5082fea32fe SHA-1: 9c5850ed6fc861521afb5b2fc49b13e96a21f810 SHA-256: ae3bfa864e357c99824748d2f34a20cf37508b0cb9edbff8a566cce8a53332e6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://druttle.ru/wix?keyword=halo+4+banshee+controls PDF link annotation
    • http://wozuwekifebar.iblogger.org/how_to_turn_written_work_into_a.pdfIn PDF document text
    • https://bazojosazim.weebly.com/uploads/1/3/6/0/136086377/nifakejejezogu-javojamu.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/cjejege/inside_out_institute_reviews.pdfIn PDF document text
    • http://zokuzovabodoloj.22web.org/zorikokufuno.pdfIn PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/aiaifgj/91811202275.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/mexoxipa.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/sowirutelevolur/gofovavuvojovefumek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61510291-f47b-4dc4-9183-365cab75d24a/30286704860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f27d79-9721-4412-b6b9-6e7bc405fb57/pathfinder_adventure_card_game_guide.pdfIn PDF document text
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_a561d345e4e249aca093fa6c760cd1f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bb2277-dd35-4bfd-b055-cb9fa524ebe6/pifedefenude.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_3de87dd875ba469badbea5cfb7a6daf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/19826660972.pdfIn PDF document text
    • https://aa4a64a1-c69a-4176-9ab9-82648dcabbba.filesusr.com/ugd/70701b_e151f4f37a5548579bbea513b0098586.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/inteligencia_emocional_teste_online.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_ad011f6ce17847f783706874de55c0cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widiku/wiwibufolisevo.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/49836836498.pdfIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_34712e378b2a4a5aaf5a10c6ddff040c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f26ae95-aa9d-4621-9e85-94119f5b9045/what_was_king_davids_real_name.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_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 5076 bytes
SHA-256: 07edd131419f91f994ec40757befd3a9e8395cd8a09d7a0130e0dd52b5d7de94
font_01_sfnt_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 10528 bytes
SHA-256: 2c881232557ce36775108182bcea9621d07d7d7f2af653d227031ff63738c7a0

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