Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a0490da3b7da73…

MALICIOUS

PDF

84.8 KB Created: 2021-06-30 11:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6590221fd07b1d429d01590bafac5fd SHA-1: af6cb488e03a012d42fea8c96506258aafec265e SHA-256: 09a0490da3b7da732e17439413cae52c4d217ca6621e3968d5291151daf35f7b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL findings point to a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=with+both+hands+challenge
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/6is5ptc8ibousfccb95q8kqn5e/46173022483.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/topuvixiratex.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88d1363c7---wobepovon.pdf
    • https://diarch.in/WYSIWYGImage/file/41638766482.pdf
    • http://diysmart.net/userfiles/file/24651323385.pdf
    • http://curry-box-deluxe.de/userfiles/file/15281912072.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f03ea46915cbe0db5f74d1c6c66b00ef/16393295229.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/ce265f821cefb34d6a27125adcc3ccd3/jadoxi.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/rkalh1juqnu892orjkod3fga1o/18034593311.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609807935e425---tefaxoreme.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/pikafixa.pdf
    • https://oddluzanie.net/userfiles/file/kaletelerafig.pdf
    • http://altelaw.com/uploads/image/file/nugofinijox.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086db000b5a7---58142230476.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e7dfeec795602c2041429626c050c05e/navaxujusiroxosuz.pdf
    • https://hanahana.vn/media/ftp/file/47744013128.pdf
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/zijadot.pdf
    • https://etonbio.com/newsLetters/images/file/puxoxigixigosonosikaxisi.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5dbe5cc40---napax.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e937be61ad4f0c83efc076ef2d242356/wasexovegijupapumozusug.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1um4t60et5d0cl67i47qkj6104/75710877019.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/htclsjcn65c8san8is96auqqsl/mekofibubogemeneloponufot.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083625e7c173---25793681342.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_off0000e700.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 16792 bytes
font_01_sfnt_off0000ff17.bin
015bdaf4da73a8b6dcb34adb40d645261db60fd818dabdcc695bdd8eb6d3acbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10684 bytes
font_02_sfnt_off00011751.bin
f5bd20f26ecb10177398fabd3dfbe0528221138b1097e7e869e796806703375e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 17832 bytes