Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f7236050f973fd…

MALICIOUS

PDF

88.8 KB Created: 2021-09-21 19:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d85f3b291e6e9d553004bc1739bb95d9 SHA-1: bb8ace414766b9b9c7d558bb1388657d32027b7c SHA-256: 33f7236050f973fdefdb639a08ff87579f625a0e33bac0c7d17e775511989675
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs and is identified as a link farm on disposable hosting, strongly suggesting a phishing or malware distribution attempt. The presence of external URIs indicates the document's intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://wastran.ru/uplcv?utm_term=mobile+legends+apk+app PDF link annotation
    • https://hinodecoder.com/userfiles/file/lariwitifaviboloror.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/nubawomavipuwozowaxisiloj.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/mikapozexipabagonepatik.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b7fada16ce4b6b0c0043d03627ef9bc6/datakowigudovojud.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/23342492063.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109090725049823.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/50914904484.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210902_011943.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/sifojije.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/3361728902.pdfIn PDF document text
    • http://livestocktool.com/d/files/vojejodutovikeza.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/6701091080.pdfIn PDF document text
    • https://eltdb.com/UserFiles/files/98838067965.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/nugitat.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/55261958137.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/13561395943.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/lovokuwefifefe.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109152057305207.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/19593589031.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/fodowatewabem.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/16175855907.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/54182101051.pdfIn PDF document text
    • http://laguna.piyawatgroup.com/images/files/63858059601.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/rujoneko.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401ac2e645d---denavilirezasawo.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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 10592 bytes
SHA-256: 6ce4e486cfa000fb21d8cffbe20c67167aca4b232a1f1b546da4e8827a781122
font_01_sfnt_off00010c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C78 19000 bytes
SHA-256: 24847275b8fede9b29a62ced597b521a1b667220c281c398211327e79bafba43
font_02_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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