Malicious PDF — malware analysis report

Static analysis result for SHA-256 12946e9970b30e0d…

MALICIOUS

PDF

86.9 KB Created: 2021-05-08 03:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71ed58a911e1bfe2ae967e1ceac85bd0 SHA-1: 221cb94086f617fbfe12d2cb5af39cdccde0d193 SHA-256: 12946e9970b30e0d33a70c131f2bfb57498d4ce4c9dce86adfe4499023665c9d
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document attempts to trick users into executing commands, likely to download and run further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://resalured.ru/strik?utm_term=cisco+router+configuration+manual+pdf PDF link annotation
    • http://uk-delfin.ru/32303240820camde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_6061d49737ee2.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/mudufovofetomabudoferej.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/hdhfjgY/77034832389.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/gihhagh/mindsprings_health_glenwood_springs.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderipamuva/gjiYh52/asia_bird_fair_2019.pdfIn PDF document text
    • http://vajokopopozikem.medianewsonline.com/38944153961.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/cFV8hht/puwev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6047da59350dc.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/WjbHiaO/dobab.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/mgghbIo/forex_trading_for_beginners_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_606a61f23f48c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fe26f33af690.pdfIn PDF document text
    • http://acgmgroup.ru/crochet_lessons_for_beginners_youtubew5yvl.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/cihbvvx/96283597789.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/00bc383871be.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/jEsypOK/viral_video_definition.pdfIn PDF document text
    • http://filanion.online/powerpoint_slideshow_template_free3he93.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/JmDYDje/6642656042.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/74883980813.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/1tOxmhg/karuppasamy_songs_free_masstamilan.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/rafametepogijilidaposow.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/6552930.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
    • 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_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 5380 bytes
SHA-256: bf8ecf82f16fedd5be277573aac8c98ae2c8e0eadb9b39a51ab95ed4c29ae72f
font_01_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 11120 bytes
SHA-256: 758c901d3b7e4f9ff6fe3d7dec4b8209d7a3319cd66e85066db68e1158a05ad6
font_02_sfnt_off00013fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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