Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb67ddea6445b24e…

MALICIOUS

PDF

92.3 KB Created: 2021-07-19 21:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 263119bf277119f83f4b6a388d41b276 SHA-1: 4e250a4c49395e63f196cefe5a321a5de679c41c SHA-256: fb67ddea6445b24e7f8eb86ec6b4878df0bffedd03bc197c76c4ca82a53e1906
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to malicious or compromised websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://geose.ru/userfiles/file/80644039143.pdf In PDF document text
    • http://limoride.net/gallery/file/57824016265.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ahvqqfhch9ntbvjr09o65urttn/getanoxe.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/44mpbkjnggejb66r7fgpba4ei0/muxogu.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210625_4797901A12D40671.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/71308007773.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210704_230119.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/15334950507.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6b4595cb9c980f2208c8fd8e4b387f63/77995870248.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/90020433200.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b31403087---67449766342.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/n93tl99skv26hr93qg8kjbg8bs/rabemase.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/94566954778.pdfIn PDF document text
    • https://stopserv.ru/files/file/jigukowutut.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/22853707580.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160705190a6056---96237344289.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e03a5b5513a97138322fe29615215c74/25310341969.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/46425737175.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e0b93c25c---56792376451.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/58630887453.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dc4704ffa---4764802874.pdfIn PDF document text
    • http://ecole.ru/text/images/file/pifodutanezasomutazu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/db8759dd630f5529305d40765b8b363b/kuvokibupuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=luke+2+bible+study+questions+and+answersPDF link annotation
    • 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_off000102cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 10996 bytes
SHA-256: 69e8908ded085f75f1f9c1198abb0c4da170b59142ab66d5dc811c7be702bc60
font_02_sfnt_off0001347d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 17504 bytes
SHA-256: e8d162e03e289abcd1d956ec09020e4611bf87cf779891cef9485ab43dcb9069

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