Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade97314fc381680…

MALICIOUS

PDF

84.4 KB Created: 2021-09-20 17:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db116581de6c998247f3443352e7365c SHA-1: 8972972ab3ae2492879776422d07078d63bda4fc SHA-256: ade97314fc38168067d47b9ce718f493e41d80e222f5dadc819812fc53574d47
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, indicating it is likely used to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a large number of links pointing to disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=efs+backup+android PDF link annotation
    • https://noventa.cz/media/files/file/58886735537.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/kofewikevolesoxobu.pdfIn PDF document text
    • http://gdgom.com/upload/file/210904073309905895nwgbmdp21sb6.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/12807846938.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/31759319942.pdfIn PDF document text
    • http://bdsductri.com/upload/files/wigukenuvuworijamex.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/wunuzipukoken.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/tudavige.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/60567534147.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/65366937791.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/30985884785.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/roduvebod.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/9179104017.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/fejexekajanoxezasaxidi.pdfIn PDF document text
    • http://showdoimovel.com/files/files/fotimum.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea360e11e6---65144840183.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/kodobitaberemidodobuviwit.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16133c6377faf0---88975138219.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/45700578576.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/bizegipowugoropulifuguli.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/12701246805.pdfIn PDF document text
    • http://lscapital.it/images/file/jokafurotarizosopu.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/57738796829.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/33644511120.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_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 18040 bytes
SHA-256: 73abde17d7e959ccbf5ddec5d7900495d16aa7ed3a8ff1b71f83f387b2e7e8ed
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 10652 bytes
SHA-256: a2303c116863a3ebf2b2d4ff11e07836ef540bcd403f202258bada470fb01d34
font_02_sfnt_off00012c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1