Malicious PDF — malware analysis report

Static analysis result for SHA-256 3095ae452c7ac2d6…

MALICIOUS

PDF

89.1 KB Created: 2021-08-02 03:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 11d0812d2f0acbd91eb7524c40bd1348 SHA-1: 77a8646b9926f1e7e4c0832c47dca3322555c5ef SHA-256: 3095ae452c7ac2d6fdbe4ce4f013bbac1dc74b22e1504788af9d88bb5427d72b
224 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of a 'Recovery secret / private key request' heuristic, combined with numerous external URLs, suggests a phishing or credential harvesting attempt. The document likely functions as a lure to trick users into downloading a secondary payload or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=50+first+dates+movie+download+480p PDF link annotation
    • https://digireg.sk/upload/8725408011.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/jixukepor.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d34f433baf---kopiwudapetesanewufe.pdfIn PDF document text
    • http://elmaryapi.com/ckfinder/userfiles/files/watila.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/78783024806.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/47041964133.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/849e5d547ffa4a3b089e02bb1ace9078/pimezalonarelavajawezup.pdfIn PDF document text
    • http://polletnv.be/uploads/files/fatasemetuzezopusin.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/80466099446.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6f2f15b0797a543730ac6f155ed8f592/xikidojazuje.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/jobekudowikej.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/uvffqaf8vgr4tgq6hv9s4lasu0/70572905980.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/lm67lsg6et9od0bj4knrn14v6s/ledam.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/43956442129.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/75461451673.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87ec286dc---80947998967.pdfIn PDF document text
    • https://bataretak.com/img/files/file/57590986546.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a5984d48c---tulesixogubodetuxoxonofi.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/72357057960.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/4qoo2s4gvaed6aqjhog4gbl4t0/69251028942.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/hi1i5g4k6di3b9hb2e98d7vp3u/japawafis.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/zuvumafikaxese.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/3460178344.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/bikugoriralo.pdfIn PDF document text
    • http://gdgom.com/upload/file/210603142606257484cs6czzvcck8e.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/cee5969bc9c4070d8a455182045b5300/4847699578.pdfIn PDF document text
    • http://btfa.tw/upload/files/66743587887.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 11256 bytes
SHA-256: dd5df3a500527353cacfae1a0cf5b51c0b7a22b7e774abf971bc4b295b6d4879
font_02_sfnt_off00012718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12718 17804 bytes
SHA-256: 17cab56860a9f177dfbb7ad50c25520c3ef8afecc1b33536de29735ffd38f00a