Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd221b6fbc63aaf…

MALICIOUS

PDF

78.3 KB Created: 2021-06-10 11:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a0b78222de9c85ea822ba25a868ae14 SHA-1: 4f6e72877ae59524aa0896eb8f6bb8785c9f014e SHA-256: bbd221b6fbc63aafe7a57148306fab6101771a3703aeb4a5b0f872a074acfefa
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, luring the user with promises of prizes or funds and requiring them to interact with a command-line interface. The presence of multiple URLs pointing to compromised CMS upload storage and disposable hosting suggests a distribution network for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=photoshop+cs6+portable+crack
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9oh0jo4f1th2uc5d3smrjs1t6/pesibosubilatinumidizepas.pdf
    • http://anaminfo.com/attachfile/file/47440552918.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092388ff311b---81461417726.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/24519486434.pdf
    • http://shuswapladystriders.ca/userfiles/file/51101866154.pdf
    • http://lycee-elm.org/userfiles/file/veroku.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a664623b541---pebabepo.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af94eba2543---vepemusupezowamuzula.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/76193372260a929f3486be.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/0ffad2255a710c5a3796e2780b75425e/bizewokanabobudipuguzub.pdf
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/cfcafda79ff1b6254ab9f935ce4821c3/67700420836.pdf
    • http://provia-events.de/pics/fotos/1/file/gatesul.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vo5bpdsf0teticc5b125kfl0qn/padawevolusadu.pdf
    • https://hometeamcorp.com/images/usr/xonenesimikelikoza.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/gft56j923v3khc4pi52ssi3872/52967833259.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/1bb5eafb31fabf55484cba0be1b02250/99245549280.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae4dafb77---17766205610.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/69202655252.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f304.bin
4b320ebae023155d9997fc2c2041aa5cfa446393a5ab22da0de7ef717fdd5f88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 5380 bytes
font_01_sfnt_off00010543.bin
c438abc8d324f0d4aff3b97a75da70c8ad18f32c71eaa8bcd67af22522c57d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 11224 bytes