Malicious PDF — malware analysis report

Static analysis result for SHA-256 473e92632216198c…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 11:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0f6b83fc72452304e53c93c133f211a SHA-1: 495dfcb695cc93b61e178666ae449ef1b2279885 SHA-256: 473e92632216198cdc6ae87a92a90bc8b5b1a93f5fdb550d5842211f8febdbfd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=your+song+moulin+rouge+pdf PDF link annotation
    • http://asja-doll.ru/userfiles/file/89775677346.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d9abede1---84614451235.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/milobawafosusakogerar.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd89e489c9b---99170086355.pdfIn PDF document text
    • http://adveotec.com/img/file/bixemimuworalobadubasoge.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd014b17e9f---mutanik.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/12968480915.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/xumofuragufanipaledufi.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608111a4de94a---32605436171.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90142ada8f---47095362470.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/rifela.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/44eb255fe5e8e99b3bc4cef2cd30ad49/2757295174.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/12980048266.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/38030144444.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5276ac06e91bba13935a82ce8e0010a8/kizaxiluvatezuxoxakeb.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/82292106433.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16119d319dd836---44205037087.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210502135700482232640.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/toruwigosuweredenew.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b9285602---wadetubesototonawonivili.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/jarajopebuxixixotefewi.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/98403052165.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/wujabumefeligosawutaj.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6dd5be5af7bf2e61510c12d09dc1de8a/tifowalofa.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ba8396b2d4e---wobomadogiwutebigax.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDD 18868 bytes
SHA-256: 67f92c6907b6e436d2dbf15a80f281ee3b8d4f0d184f3614113fe6fa0b27a14e
font_01_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12651 10664 bytes
SHA-256: e465ced31208eb157d3c8e33ce218ada36cd064799f126a7b88d69ddfee1513e

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