Malicious PDF — malware analysis report

Static analysis result for SHA-256 027e456ea81699f5…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 04:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fda40bb74ab7010677f03c629703e30 SHA-1: 189bd91a0ca8a395239f76d03038545c23f77065 SHA-256: 027e456ea81699f5dfce8b84e0b9be25e30b81221928958b817faad2475c82dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farms suggests an attempt to distribute malicious content or gather user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ketchas.ru/uplcv?utm_term=mengubah+word+ke+pdf+offline
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/ahfkqtpoj6rfr1bgq4eaaqj063/jetus.pdf
    • http://suttonoakfarms.com/clients/880813/File/lipomefebugagefemubabisa.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d2bcd22115661913a5e38ef721303cdc/39020942291.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1480ac541---9217029403.pdf
    • https://bulgariapools.com/contents/files/lolub.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/sa4grjio4ae9tc7ssu5d55fm45/71099594755.pdf
    • http://dush-kz.ru/uploads/fck/file/94905828044.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/lidijazepofofa.pdf
    • https://bookatowncar.com/userfiles/file/92582214761.pdf
    • https://journeywithmypet.com/ckfinder/userfiles/files/vuvanituveguneruduzutad.pdf
    • http://atut-biuro.com/uploaded/file/72799939187.pdf
    • http://dh-cell.com/ckfinder/userfiles/files/40396236677.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/famada.pdf
    • http://vmkmsz.hu/userfiles/file/22046351349.pdf
    • http://atek-ent.com/upload/file/zumomarunefagogudaw.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c04c14d6791---kekodiluxezagogo.pdf
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/55994545093.pdf
    • http://dilimkebab.com/userfiles/file/56861770001.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b83c95190---26037966848.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac18558c817---82728003740.pdf
    • http://ndt-ultratech.com/files/37820539797.pdf
    • http://haisushitogo.com/uploads/files/modofanis.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7fb90e87a---6851622331.pdf
    • 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_off0000dd39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 16792 bytes
font_01_sfnt_off0000f54b.bin
91694c1e8b9cf90a7ae04c4f04583c49a26baf8e0e504c0f3093998627804a22
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 17244 bytes
font_02_sfnt_off000121b1.bin
8677989091d72481b777492f4744b00eb6554c4bcf311612b4ab133f4f6dc8c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 10920 bytes