Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0853bcba5f4144…

MALICIOUS

PDF

75.4 KB Created: 2021-03-30 01:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3114bcca8696a060c5392f606a6744c0 SHA-1: 9ea1dac5482d39d92f652acb121b2c81982e5701 SHA-256: 2d0853bcba5f4144c251363e50ceab776d8ee2e15e2b098c71fe5d5359546b24
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 0.9997

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://dugedepap.ru/wix?keyword=pwi+leveling+guide PDF link annotation
    • http://form-lnstagramcopyrightservices.com/the_tell_tale_heart_by_edgar_allan_pr163d.pdfIn PDF document text
    • http://sallehub.xyz/49401576835z1otr.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/5226455.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/sajajulidapatunex.pdfIn PDF document text
    • http://mscredit.info/534882184009vbnx.pdfIn PDF document text
    • http://gnfcns.info/the_great_wave_off_kanagawa_writing_meaninge2hnh.pdfIn PDF document text
    • http://damvglaz6.xyz/99717277494rskd5.pdfIn PDF document text
    • https://kowizonijate.weebly.com/uploads/1/3/5/9/135991151/9987635.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/65884200181t7hgd.pdfIn PDF document text
    • https://pajobozonojamu.weebly.com/uploads/1/3/3/9/133997184/manusot.pdfIn PDF document text
    • http://arfesopt.com/how_to_measure_voltage_across_a_fuseqwz9k.pdfIn PDF document text
    • http://martakkord.ru/lenaduwugqkylm.pdfIn PDF document text
    • https://xezamojukugenu.weebly.com/uploads/1/3/5/3/135316948/rerosotabadopip_jaludiliwilopi_xadoginegigosed_narevasopur.pdfIn PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/c6c1645.pdfIn PDF document text
    • https://pogiwaxo.weebly.com/uploads/1/3/5/3/135312355/supebap-disesi.pdfIn PDF document text
    • https://jedifugidu.weebly.com/uploads/1/3/1/3/131382595/sajegikixe-lakixudedoz.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/kixuno-puzijujep.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/vufupu/factoring_by_grouping_worksheet_answers_with_work.pdfIn PDF document text
    • https://4fd7ac12-06e8-439c-96a9-7636004ccb32.filesusr.com/ugd/9554ab_a01996ce0cec46129e971382b35d1f14.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/xiaomi_airdots_manual_espaol.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_cc49f635a6c9421bacaacb6f5ae87edf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 4660 bytes
SHA-256: 940b5f5d9f02d33706933c9dddb6d4b18ae67bd84adc598a78a52b1bf4c37ed8
font_01_sfnt_off0000fa76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA76 10820 bytes
SHA-256: a8f3e0909d356dcc540c3633ed7d08212f98cce5f982513474cee46257aba964

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