Malicious PDF — malware analysis report

Static analysis result for SHA-256 27225df6bd36d08c…

MALICIOUS

PDF

71.1 KB Created: 2021-09-19 02:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 69940516a34f40cf405eb6f8a503416a SHA-1: b46ea09ad5cee91e1e28a07dd04e2eadd8bd690f SHA-256: 27225df6bd36d08ca6076aa5100acc18c7c191d425d6e4d451afcb25dda45af8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, one of which is hosted on a domain associated with formcraft file uploads. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b0ee8b26b---pitetodugagekug.pdf In PDF document text
    • http://sochisushi.nl/survey/userfiles/files/pojubefodajame.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/gonavoli.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/72699441050.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/reduxefa.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/79993116942.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/82843480681.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/43368543532.pdfIn PDF document text
    • https://mkontakt.com/dat/file/21538052559.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137be8a989f8---jexidip.pdfIn PDF document text
    • http://dobermanncz.eu/files/bavaxadubenimoj.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/69085095596.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/jomofufoniduzeliwepisak.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/76606130236.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/wafuvubizudumelobijav.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/watuj.pdfIn PDF document text
    • http://baove247.org/upload/files/18117977498.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/64083391093.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/37908745050.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/bexibewogoferev.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/darowes.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/29123655869.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/pawojemowinozuvotifepuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=mini+militia+game+hacker+downloadPDF 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_off0000b1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FE 10820 bytes
SHA-256: 270cb7f678b37bc2ffd704f1279efc3819a9122536914c80ee1c9255378511ea
font_01_sfnt_off0000ca8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 17016 bytes
SHA-256: 0edbf74a2eaa62c3dd175097849e6b51b40dce0532b3576edffb8fd8c4f6d1fd
font_02_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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