Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd79fa9beb665ee…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 03:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a101123386e165dce3384e50406adc5 SHA-1: 5549444d225c97f0d6365bb26d46bc4143f870ef SHA-256: bcd79fa9beb665eef80eda078e275f722fdf95a2a7b98e355d44a773aca180fc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=how+to+clear+one+touch+ultra+mini+meter PDF link annotation
    • https://cdn.sqhk.co/kizafizutuw/jegjb4l/online_slots_free_spins_no_deposit_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/wjai9jg/lighthouse_cafe_newport_parking.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/xaxezopuf_madidikel.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/eLKeFie/xafosinukori.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/6860378.pdfIn PDF document text
    • http://max-lifting.store/how_to_use_the_control_solutiona4c1k.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/21026447114.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/iijchds/run_sheeda_run_game.pdfIn PDF document text
    • http://opssmall.space/pebidunudawepaxaxupurok00je5.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/pjjRBgc/sikisa.pdfIn PDF document text
    • https://gazezujebek.weebly.com/uploads/1/3/4/8/134881616/ad48e585caa24d5.pdfIn PDF document text
    • http://medicinfo.online/40238209787j04k9.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/ehdCYXB/fuluxuvokef.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/Ahbgegi/ninja_raiden_revenge_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_81e81c538ba8432cb0d532d3f7b5a34c.pdf?index=trueIn PDF document text
    • http://safedoguno.onlinewebshop.net/addison_wesley_chemistry_11.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/tactics_for_toeic_teacher_s_book.pdfIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_0724dfad09c94f02ad918c4eec43d9e5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 4796 bytes
SHA-256: 5240817e434c5f97a7cf5865641a0f23cd8b6f769bb796442d1dc206ec1cc622
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 11224 bytes
SHA-256: 844edc0acefcc25eae2f406e692d2971c4508f0441d38e10a53b0a47da02a7a5
font_02_sfnt_off0001199c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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