Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b0a10d87258bd7…

MALICIOUS

PDF

83.4 KB Created: 2021-06-30 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a071fddc5f41e674ff6051168e79e78 SHA-1: 80f3ac76cc5ffe6388dd16d01e2dde3af0abf4c4 SHA-256: 07b0a10d87258bd70d08000860eeb347c0aa45fa7b07b935c756e32d5c245ee8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/eadff73c498db08e6edbf20d96a7c49d/20807077129.pdf
    • http://btc-ltd.com/upload/file/wefogafibedokutinu.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2723e41ed---ganuvuxosinasolukupo.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd25a2d7501---salevavex.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/8a93743788a46ed4ae7a381a04a23bc3/78762410397.pdf
    • http://qkmedica.com/uploads/userfiles/file/belimuputesana.pdf
    • http://altinay-law.com/images/file/74605103937.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/sp1r1ku8pvvpm4h4b4qu2m7882/lusasexoluzak.pdf
    • https://cbdc.co/uploads/ckfinder/userfiles/files/34058404643.pdf
    • https://lapalettedesarts.fr/gestion/file/paxutasawib.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/bubudewomanubi.pdf
    • http://shinies.ru/img/lib/file/33417364086.pdf
    • https://turbooto.vn/upload/files/608599072.pdf
    • https://virker-ikke.dk/files/bupepavonijopi.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098c050bd1ea---8837491756.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/73843d3359cd2a7e6618dd837305983f/35136981906.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4e80c1076665b9ab17593c1b7ab726c9/taxunusetiripasidov.pdf
    • http://stlnsk.ru/uploads/file/xoviwomej.pdf
    • http://ankurgroups.com/userfiles/file/xiboranunux.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad292be0f0c---21089143168.pdf
    • https://vandolderskb.com/images/usr/bumev.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=naruto+approaching+wind+card+list
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c24e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC24E 16792 bytes
font_01_sfnt_off0000da65.bin
3c9bb9a9460aed387a06a2adb414c4d52675e73d392e2228bbe0fbd0e943e0fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 10824 bytes
font_02_sfnt_off0000f327.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 16140 bytes
font_03_sfnt_off0001089f.bin
28356f8e54c3081c5f78edb46074546651e91d0bacc00de58bdd86eae37648da
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 22336 bytes