Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec69af0ab273940…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 18:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 866520b307b3c9adfa8fdd810594c463 SHA-1: 9068d660e4638d693480d2e40d136854b929a92b SHA-256: cec69af0ab27394080497382b2c4e0ec5b90773eeb0a5a6305321b8813c733aa
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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 http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f6f1409d2653278bc61eb0659a916a08/70174228570.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/htqdjf2f40g8bkh7m23b2jjm64/17955334688.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160946552bb849---pukaban.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/5a894b8131f7d7fe2bc9d803a85bcb28/2867516550.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210627191655_csuz8i.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6b989331e40810ef2094bdd3555a1cc5/ruforawo.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a424138028---76087175832.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/6c129e39e627c8388db3e29036842ad1/setukop.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/75a9d14991b80afcb9c07d24468302ad/tagimubufukeliruk.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/10215776dc83d67968201a0df9425883/wigesaxugaridusinapiv.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wavitipaxesasovapeluledam.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/83ed70cde9f255771010f60517edea19/35778465332.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c21321ef854001f5fa813168ac0120e3/75140297976.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba18b6438f0---18337986017.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/lekotila.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f5a41b549fa19b0b099b4e4590e3ef54/bidokedazodeko.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/misaguxilul.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oqg8bq4504ndhhfv4sgpjs29t5/pasepul.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/wizuma.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a4784fc0a---59234177035.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f3304dc9531383f182dc074465584e04/nuwosejoboxepebusixa.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/23919623582.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948d54b3df3---vakos.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd5a1d977---vulevarunegemitano.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb0a04fc3---berenekakifoxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=short+civil+rights+quotesPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 10632 bytes
SHA-256: b3baedb1e2742c3c7b54c44bdd864567b3d9353706f730165f1f8372de7a1253
font_01_sfnt_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12415 16192 bytes
SHA-256: ebec28a66e609a378a85af8daed0c7c618c2dcef57b8271d2afa8fbee86f1ce9