Malicious PDF — malware analysis report

Static analysis result for SHA-256 967f84fae5be2028…

MALICIOUS

PDF

71.0 KB Created: 2021-09-21 00:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bbd59620badbbbfde5dbd0a7869a2b15 SHA-1: 3585b2c119dcb5dd20edd5b05cdd5e7798da51b5 SHA-256: 967f84fae5be2028630ee5de18086cdf903b6a7bb97e3fdbef9e03f45d5f7c0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to link farms, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://burgas-remonti.com/userfiles/file/26589723908.pdf In PDF document text
    • http://aligokdemir.com/resimler/files/89227391388.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/wugowerabukug.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021091016464595.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/fijekoxobitabuxefadalexu.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/voxesowosoxexajapajakex.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/97388896139.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/70779476047.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/noxusutetunituvobide.pdfIn PDF document text
    • http://hevolta.com/upload/file/gugafukubuxin.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/55564337994.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/zerin.pdfIn PDF document text
    • http://xhzhengli.com/upload/pumumuvugapifofumasemisuv.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/kikusisukiluk.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b24b15e405---rapomasotiguxosowaze.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/14997722432.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/lamarewa.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/vegixobapuvopoduva.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/judaku.pdfIn PDF document text
    • http://roocenter.ru/upload/file/12348553336.pdfIn PDF document text
    • https://yodobashi-church.com/41388596288.pdfIn PDF document text
    • https://defi128.com/userfiles/files/5758247734.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/junexa.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/41788353175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=free+insta+commentsPDF 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_off0000b59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 16324 bytes
SHA-256: 9339631bc8ec446d8bd5f9965407e808814b9267c6a9e7caf78db50c3f484bb8
font_02_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 10320 bytes
SHA-256: ad9c3b180da4ce77e9c1ca05ae5acdc5cec439d059b718b56384e855095a92d1

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