Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fd5687068aecff…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 19:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bc8619ffa1cadd4b310ec1bb5f7864f2 SHA-1: d9a602335731c5b498fb364134d833feba895b1e SHA-256: 14fd5687068aecff608caf7a808ee91b5c8972439dc870a36de91369c9964293
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. It contains a large number of links to various domains, many of which are hosted on disposable or suspicious-looking subdomains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of 'utm_term=flyer+poster+maker+mod+apk' in one of the URLs indicates a lure related to software modification or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.tecnobor.es/ckfinder/userfiles/files/36704367679.pdf In PDF document text
    • http://www.asiacoservice.com/file/files/pulelufujizi.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/pagogipeva.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210922_143220.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/69649999387.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4c97766a1ac99ec66484084277827db4/gokesitogumepufi.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/xanujogubezusovifip.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210924001521.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/xodokixo.pdfIn PDF document text
    • https://kapefashion.com/files/files/45080571190.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/73014588239.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/47294863424.pdfIn PDF document text
    • http://qdjshg.com/files/file/gemamufiwam.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/kukemelawofibaseseg.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/petuguta.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vofuziz.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/54447206190.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xufix.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/zimawadojo.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/pukeduvivowedigiw.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f90abdb97---72830443454.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/genunifijusidoxoxomaxanak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=flyer+poster+maker+mod+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_off0000b00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00B 16780 bytes
SHA-256: fa364325b4cd1f93ea6443b459a1d284928e829b9fb994247ca795c229929599
font_01_sfnt_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 10540 bytes
SHA-256: d1793bb93cc892a502f52a1fbed181cd424326de034a7d8a3fd502dcff4d98ed
font_02_sfnt_off0000f27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1