Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f22288efea6b05…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 01:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: adfcf0a06fa502e3a0e91de9b4720893 SHA-1: b55ec9e7acfedbe28376126e8ad0eb1a16b1a4bc SHA-256: 29f22288efea6b0587ea8b2146c434abda13c93b682f97cd32a05fb251398304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/aafe3486120012260f999c728aff1358/56363763766.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/e46f53359cb212f02df8e3a154006a6b/gotejejo.pdf
    • http://netinflux.net/userfiles/file/51923409397.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/dff0018683c62230946cd73877650e40/86214282765.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b330271b660---delakinoxasogakitupere.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160809d273f49c---tononizoderonipejifuxudo.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/84b220e7e722af67cc380b05d728343d/zalorutibigitose.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/1fdbd4ea59110824f2a4956765c3ffe6/dijev.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8gjmrm63aj7h5ifre4mov32f4/zibediw.pdf
    • http://moto-bike.pl/userfiles/file/41756748271.pdf
    • http://royalwedding.jp/images/blog//file/jutafetemedunotole.pdf
    • http://indovinandoilmondo.it/themes/userfiles//files/rakuga.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608780391cd92---lumowixeritaxaxoru.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/t659hgqu2ighvuhvrucajp3p00/34250200708.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087df0636e85---85561489978.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/skhir5cakbq43qfpkm7arugo33/vipavovebugajagoselixiw.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1f94ec84---jumukojuno.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/81854011794.pdf
    • http://greenbrier101.com/userimages/89199356685.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ac402948e942d765ecef2b41b9cd2b8c/55253353819.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c2f014823---27459453859.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094babcdaa9c---mogufimopoxokub.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/471f97fc796c240d22822bf0a2ad0719/risororozatalevukovigiva.pdf
    • http://amirafouad.com/uploaded_files/file/nibexigavo.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c960bd6551---72329000841.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/73e8a5bf0ffaa85b035c18a431845512/35574553787.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=radian+measure+of+the+central+angle
    • 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_off0000ead4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 16792 bytes
font_01_sfnt_off000102eb.bin
a02c33d4d54c55c673b6bb5fd688ce35923e0665b869a7ab3fb8bc897c753484
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 11068 bytes
font_02_sfnt_off00011c44.bin
a21ebac0e05e327bee995ea0913f069531842f4942dd73bbd1894db55419dc26
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 17116 bytes