Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0f2ae4cd9a91f4…

MALICIOUS

PDF

87.0 KB Created: 2021-08-17 00:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d03dc51c2997af9d2a474f5995e3e5e SHA-1: 324be7cfceccb0b541867ac7b9977d661be2eb07 SHA-256: 1e0f2ae4cd9a91f4c1bfcaa2fb477a92d5cd382e80674a526e93be1ce8c5b5bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://freewest.at/56776657788.pdf
    • http://cuiquji.net/d/files/58217725671.pdf
    • http://macierz-grodziec.org/files/file/baworejogiluga.pdf
    • http://cherryontop.pl/upload/fotki/file/gimur.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/17b189109f4a5c1ba08d9122f23d220b/55342927396.pdf
    • https://flardochform.se/userfiles/file/17454664462.pdf
    • https://epiphanych.com/images/file/jotuxademozem.pdf
    • http://kojeneckezbozi.eu/userfiles/file/gatawuvalib.pdf
    • https://purefeeling8.com/data/file/jibogileta.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c62e46f22---88051297993.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104dec65c2bb---pazigelut.pdf
    • http://banquat.com/userfiles/files/zotepemonofaj.pdf
    • http://interiorsexpress.biz/dayafter/uploadimages/newsimages/file/zuratoremowunagesa.pdf
    • http://ikkosushi.com/uploads/files/61338937792.pdf
    • http://ghioroiu.ro/sites/default/files/file/zebirokufapirapekalidin.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/56986a7dc63bb5b38bf3300886841986/ramuzizakuje.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/211410de462bfe381bc2de8cfb1ee932/lijisafazomejigurisekab.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfde9e9e066---vupizerujegowafem.pdf
    • http://heibldr.hu/FCKfeltoltott/file/5092553486.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160930607980e3---76127019002.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2bc6ddd6e---83856043933.pdf
    • http://candientushinko.com/images/file/72042314548.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=prentice+hall+algebra+2+extra+practice+answers
    • https://mediaget.com/userfiles/files/46392028046.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea4.bin
98940b3a2287c8b24d28b91c3ec0cbf6d4c5ea1bdd1bc4861f3a419c6ea21a20
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 17532 bytes
font_01_sfnt_off00011cda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDA 16792 bytes
font_02_sfnt_off000134f1.bin
2c01d2cd8838449559afb996e2cd4ca1ec377d3ae78a0776e963b887d2e49afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F1 10980 bytes