Malicious PDF — malware analysis report

Static analysis result for SHA-256 008f27dadd9ae114…

MALICIOUS

PDF

302.6 KB Created: 2021-07-04 16:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eb75d44194b25282bb20f6558c3c7803 SHA-1: 320209e7217ecec27754cc027e2e04f2cbd16616 SHA-256: 008f27dadd9ae114a795a2f14eacd68a5162d15e856ba9199dba99b4bb08efc3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c24044fd6---65312908148.pdf In PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/cec22c5c0f53c531df35295cc684accc/88645553248.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/e568261df5bd6be01a3408f178fcf597/55530108680.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/9a5ed496ac455acc16cd6a447d695661/zuralubifevuvenoluxosida.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/dedilalerakefelipega.pdfIn PDF document text
    • https://bauarch.bg/files/bonezasudabubi.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/3fkupj9vqnftoiakjase15j55u/sotabaxisor.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021052117212573499.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/28897180263.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090ffe81ddc8---86808393109.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105162149.pdfIn PDF document text
    • http://carszana.com/image/upload/File/79391398569.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/hc70s0bi9r0559qlq1khjda574/noluwidifumusa.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086c605d2a97---45181410901.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079f4d891276---25577831378.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/tojazubikiwasunope.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/6e98d57b69f2d642ae12eb4a511c3def/zebotaxaleb.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ba00cccc0b665c4725622d295bd4f9ba/lopapasiw.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/291447013813.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/benifitorerajavomofumuleb.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/99763762897.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3902685o1of6vs48vorhmv24c5/wifedapafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=frankenstein+chapter+11+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_off00044dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44DCC 16856 bytes
SHA-256: c973f264245c3421c019936045441edf526223be08bec9414d5b2865da8b2bc0
font_01_sfnt_off0004799c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4799C 10792 bytes
SHA-256: b0f7ac471c7d72bebb50912923157039e28d2ef5d55b898464d6017289dc2e01
font_02_sfnt_off00049274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1