Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc2abd060c45f71…

MALICIOUS

PDF

82.1 KB Created: 2021-09-13 12:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 07276b015b612ddb2e43866196bef8bf SHA-1: b2fdcfbc3d9d76b3acb7b058e4585276c4cd456e SHA-256: 7cc2abd060c45f717956ca0a5dec802fb3ae958ba44a0ef10640c110aa901d6a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to potentially malicious content, and the PDF structure suggests it's acting as a link farm. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious purposes, and the overall structure points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pcparts.fr/ckfinder/userfiles/files/19589505281.pdf In PDF document text
    • http://queensparkview.com/image/upload/File/tarorufuf.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/pelexajazuwakuririvef.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/lujemug.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/51631533631.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/11109572052.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/k7tjmg8glr7p66r1nhr2ueq1cg/firudetalejanoxifud.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/mupapifalapamisazinavaloz.pdfIn PDF document text
    • http://namngonviet.com/user-/files/muniwutaguxuwo.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/90081496262.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210909232417103.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/teranobaduma.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bcqbdtabq5nsuumidhpq62umg0/regidinavilejok.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///gukigasu.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/kidomaxasuvijujanom.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/23016864887.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/nejimoweriwediwume.pdfIn PDF document text
    • http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/gajegeriburatokakefu.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/4311876070.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/2618408256.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/rawanunurazirevifopod.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/befid.pdfIn PDF document text
    • http://rld-carbon.com/file/37186301248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=aim+expert+for+8+ball+pool+premium+apkPDF 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_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 10872 bytes
SHA-256: 1683634a3e90f7939f290fb7340b3f59bcfcc7e451e31fdbc829387befa48eb6
font_01_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 20052 bytes
SHA-256: dedc35a854216bb83e60e383dc88f9ff4b8b90ba12a272c9e14690df2fab2387

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