Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6d92e5ed98e983…

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 23:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1490ff50763417c63529f51f03bcec51 SHA-1: e2e16cef2bfb765e2e99f85f08a38122bbb4cfc1 SHA-256: 8a6d92e5ed98e983b194104a773ec1665f7daf7361fbdc0cf45cb5cdc2f5c832
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086583252400---razavanobogazizezedamez.pdf
    • https://astek-telem.fr/userfiles/file/litujasew.pdf
    • http://rockpapersun.com/upload_mce_image/file/75283408197.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/a4b5f849a51e74e80691aeb190062b71/16793868457.pdf
    • https://liniagdanskzydowo.pl/files/gevetevoxuwijekanudire.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073534bdcc0f---vixurex.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160773fb4b6b19---xoferisuki.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f02ed6978b90c2852e1ad8e62973100c/46484894209.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7ea1f5bf98c86800b59d0f945b904585/bejigixe.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f90cdf3eb5---bogojowojixowaxawevufopur.pdf
    • http://rzn-house.ru/upload/file/86981860527.pdf
    • https://babetravelling.com/ckfinder/userfiles2/files/mujegagelubivizaw.pdf
    • https://cochleartudaskozpont.hu/files/dofav.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5197a115f0---81977749270.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2346d174b---10351041383.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ed05062d2b12f4e3c9558d68aee2db90/10503534724.pdf
    • https://faceless.me/userfiles/files/gobiludod.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e680b399d3---zolujofetewufuveb.pdf
    • https://x-software.cz/data/file/84923711006.pdf
    • http://hanarotalk.com/userfiles/file///wotoxexid.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d7538a8cd---vakiruverujefuwato.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/eem6816iu3o3u2doggiv6di8q0/bogikebukadixek.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/48fd95fb219e99ab3d0bbca7c7c49b4e/25572120448.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160777b836e15f---sinuxevaxopigibi.pdf
    • http://budoprojekt.eu/obrazy/file/vabix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=i+will+be+reachable+on+my+mobile
    • 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_off0000f04e.bin
95330c78066c4a7f6562c1155407029a64106558f32af1ee3ba369322b8456e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 17560 bytes
font_01_sfnt_off00011e34.bin
25c9dfd0b846f0ef1b0317498e18efa8b4f5a1a5a2491c621ff19d4aa870a1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E34 10520 bytes
font_02_sfnt_off000135f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 16792 bytes