Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9ddcbb6c2bbd96…

MALICIOUS

PDF

87.8 KB Created: 2021-06-25 20:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69bb5eb1859d69725482ee5585a12bac SHA-1: 6886e1e4c1515726600b476a2764b5703b3c6e5f SHA-256: cc9ddcbb6c2bbd96f4de4e828b68a3143d85f42f8c7ea4840ae518e916e35d9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://morgancountyoh.com/userimages/faxawumetibafizumilixaw.pdf
    • http://meteosputnik.ru/userfiles/file/gijowepuloxakin.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8e54570e---xisoja.pdf
    • http://mea-travel.pl/userfiles/file/ripizudimabug.pdf
    • http://wsystem.sk/userfiles/files/vokamimuni.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/2075007dfc4294ae46392aea00b8e300/lewedipo.pdf
    • http://www.findvoters.com/userfiles/file/tazinedokilowo.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ab0ec52da---84405881504.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/joxabizatawesuwiwuvapor.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8fa70197fbdc8a22c3776d5566d474e6/wedixedameroritiva.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900d3fd3a51---surufin.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071cab972478---dejigasari.pdf
    • https://artasedanasingaraja.com/uploadfck/file/wonugidusofudolotogi.pdf
    • http://1careglobal.com/upload/files/38330810568.pdf
    • https://parklanehotel.asia/userfiles/file/92309268474.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202159155107537.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/vr58dp7mg5nh9bir0o0f55r9e4/44414401691.pdf
    • http://abwingssuffolk2.com/uploads/files/nabasasowemowi.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b553f477d6---54544978373.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2a4ipctl23q1eomqbmq227qa91/renipu.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec06ed6499---dawunivoronaxupob.pdf
    • http://dermaktif.com/imgup/file/toxafekagumabapigizigeziw.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/cqhe7up9pjqb1t2io8dqg525fo/94900892540.pdf
    • https://ev-owners.jp/userfiles//files/5920248899.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1b62e2547---20569060725.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=itchy+scab+on+face
    • 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_off0000f50c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 16792 bytes
font_01_sfnt_off00010d1e.bin
e43d615de2b8b1f848563e44026ba8c9e684c0c12fb9a99716b0ad6be250f6d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 17304 bytes
font_02_sfnt_off00013a6e.bin
6177e3e06036fdd5c7f7edf7ad5092ef230c53364e4d5b3a73ecb5d16c79dba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6E 10400 bytes