Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0010f372b6478a5…

MALICIOUS

PDF

83.9 KB Created: 2021-08-28 17:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 37bff9aaf4d3008546134cd514822fc2 SHA-1: 9e6fbab5ff7c74e470e2f46292bad7725cdf9f4c SHA-256: d0010f372b6478a55387f6fc0180041a074863cfd2667a1cfd59244186051508
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's output suggest an intent to deliver a secondary payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • 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://animationcoach.com/userfiles/file/49133968832.pdf In PDF document text
    • https://tatsolarlight.com/uploads/files/63982626326.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/96d58db03b12981a6d016aa8c3501872/zusiwiligol.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/7036065493.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/278b28d6c78d6a36d98bbf237e0b9b48/89658912494.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/47454668095.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d8b470e212---49797493387.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/17492259128.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/t9dfglosr2tmff2ca5f3q3mpcu/76694428537.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce27f7acf5b---98002817660.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6g4bpummip63v9snisbojv1e67/99007023782.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/5207177408.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/2011643b0702ea4a44dff784af72e88a/48873791827.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/29750625423.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/pirinevomu.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/zigel.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/60737484545.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/jegewufunatob.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d7781eb2d---5327581476.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c2bf48a78---dufukefutomuxofonuliv.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2471e0f95db823075953e3660ea57de3/debifere.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/50061109705.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/24049faad44a79730cb941981d8fce08/34304830615.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/pazuwezejivekejes.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/97741773540.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/15716246194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=2020+total+eligible+votersPDF 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_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 10528 bytes
SHA-256: 0084a5248e085ca3c5c5be57ca07d5030d736be07266023168cafbaca9765577
font_01_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 17904 bytes
SHA-256: 267ac7693a1edc9a1a2caccb40147a3b5c7128aadbeb192788b8ff4b74cbedf5