Malicious PDF — malware analysis report

Static analysis result for SHA-256 e708c4f651ff4052…

MALICIOUS

PDF

93.9 KB Created: 2021-09-01 08:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dddd8b4a19eec829d1980b25d98aad42 SHA-1: f9ad4b2d55ab01d7d956952753c373c4f36f5762 SHA-256: e708c4f651ff405210c318df74a980e0a6e99fb1b305aa96903dba753c650ece
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. While no scripts were directly extracted, the nature of the link farm suggests it is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5011d6d486---29816831732.pdf In PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/zikatuzobuzu.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16224626113702.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609874df8e523---nobivurudewimizunijaza.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3261843c7---90609857765.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/deroz.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610860b50d45b---gewekekonugaleruwu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d302be242f3---sigevetatitaxeziwolosi.pdfIn PDF document text
    • http://thepducphat.com/upload/files/xonogav.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609a442beb232---69050027294.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/202156c7747afd97582458f8946de1d2/talofazeboneta.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/18469559412.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/nisinon.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2d450d03f---66092848642.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/e0afc655e936b448a36c61e1e106b4f4/77724157621.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/14923196315.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-22/20210522072022443720.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/eqifffgd4q8inniquh7cn0b4a5/8273097494.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/33903500923.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/xabodototukefisozamefe.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/omv7fu1j77bbm8vct31uiq0n10/wixemitujegizemalatazer.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/mpauep8bph842ndt3edfqlvp35/1570792003.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9a57d5ea442bd53e8f07577c53f5606e/48028466426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=extrovert+meaning+in+teluguPDF 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_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 19128 bytes
SHA-256: 86699a0c71c0afd933f10f28cc2a996e806b02d675c280ee0faf0ad7c08736f5
font_01_sfnt_off0001395b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395B 10536 bytes
SHA-256: bc88278f94af64a7039dd915da0d2af3c33c101580ca0202f8bded702961ed0d
font_02_sfnt_off0001515d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1515D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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