Malicious PDF — malware analysis report

Static analysis result for SHA-256 a016e32afbd8baee…

MALICIOUS

PDF

106.7 KB Created: 2021-06-26 12:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e42375c97c60b12ba5f0d5adfa68a5a3 SHA-1: 063fa57bc2bd358bc3fdf68706d69186e0b6695c SHA-256: a016e32afbd8baeecbf78caa1516ce0c71cf4b6e93812fff7d7c6dd38237ed9c
204 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to compromised websites, likely for phishing or malware distribution. The 'SE_PAYMENT_REDIRECT_LURE' heuristic specifically suggests a business-email-compromise pattern. While no scripts were directly extracted, the embedded URLs and the nature of the heuristics strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=dance+chapter+3
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/da3a1d4799f69c06bb9c5d793a855f13/dokupuwejedo.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b13bf24bfd---90352854662.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a01b3a95eb22b1b413fddd1328f344fa/mikelete.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c6e5e8b7a7c064237255cdc3cd7be3ef/55578425167.pdf
    • http://singer-island-condos.com/userfiles/files/83517951385.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1343eab7a3---durogomexariniwo.pdf
    • https://decoveinvestment.com/userfiles/file/14168959115.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/85f0d7d85bc7f6d774f899c14dbccd4c/govabowiduvijetan.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/812761f4ce475b79441b0c5a5897d1a8/27703984564.pdf
    • http://sunarfactory.com/userfiles/files/subotujo.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/e57e6618677c892dc25aa489febef93f/kenejodani.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/vezuzetatexofijip.pdf
    • http://kanstm.com/ckupload/files/pemelisazadimidujixet.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/m4pjm3a56h6orpjdiqlqqb7084/78110005348.pdf
    • http://www.bufolari.com/public/immagini/file/60418352600.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/fb9004cebd62b1ebfa9a6304e81853af/51965731456.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb18ad8b3---72544315871.pdf
    • https://kildevangen.dk/files/59969471858.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd44680b82---fizeragef.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609185e96a405---pobunulorirufet.pdf
    • http://batiment-tunisie.com/userfiles/file/54302311811.pdf
    • https://alakharia.com/public_html/userfiles/file/gimowo.pdf
    • https://strategieb2b.com/userfiles/file/xotuliweb.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/tewudi.pdf
    • http://trendymamy.pl/userfiles/file/zaloxil.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014099.bin
ed4443cae651858a34d101509c6a4faf9c07ba26cd3a9352ca71db31338b141d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14099 17096 bytes
font_01_sfnt_off00016d6d.bin
c0d1b4d075ad1c569bbfbce20362dd4e87e0e8ec4fddc2b74ab0c3414f2d3aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D6D 10220 bytes
font_02_sfnt_off00018459.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18459 16792 bytes