Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecfe1b65fdabdca…

MALICIOUS

PDF

89.1 KB Created: 2021-07-08 07:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c898acea31218833fecbcc19312864da SHA-1: 7333eea0f3c334577d7a2eff9464170ba2696817 SHA-256: 0ecfe1b65fdabdcaa22d109182d413583bdf7b798c5baea47237e9f44e752a4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be to redirect users to potentially malicious content or phishing sites.

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
  • 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://datong-travel.tw/upload/ckeditor/files/20210704015625.pdf
    • http://hbleg.com/admin/userfiles/files/mozevagexugup.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b394af1dcc9---libunizevejigoronenagu.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/5rd8lk7815p98tkqddtrsms890/21989365877.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160714e56c9ade---moweborimiluvawe.pdf
    • http://hkbroadwin.com/userfiles/jutogodo.pdf
    • http://rulife.ru/ckfinder/userfiles/files/mezodafufeb.pdf
    • http://fijiembajak.com/uploads/ck_uploads/files/58087447102.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87ddcd8bfe---xupuvapavupikedurunoge.pdf
    • https://golf-tout-terrain.com/publish/page/file/18474223863.pdf
    • http://strahovka66.ru/userfiles/file/xawowunupotefijosezojeg.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086076425fb6---gumag.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d53726121---kumegakaborusawatisasug.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2cchnbtu80fol8usunl7cs0eg6/pabujonavemevonugegaleri.pdf
    • http://dentalcenterstudio.it/userfiles/files/pupozugozawugutipofareru.pdf
    • https://atphp.ch/userfiles/file/38053852209.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1174e984b0---mugoxedupinipomoxe.pdf
    • http://benhvienlaptop.biz/userfiles/file/77319632688.pdf
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/19745124907.pdf
    • http://nuraski.pl/wsg/userfiles/79876870197.pdf
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/geduxukekiwerupelusevajer.pdf
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/46087402818.pdf
    • http://www.gonouvellezelande.com/files/vaxiguzu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=canine+da2pp+vaccination
    • 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_off0000faa7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 16792 bytes
font_01_sfnt_off000112b9.bin
d0b7097fb12cef88acc1210c0a66eddbe719797dabc8e4a366f715ee5fbcba01
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 17220 bytes
font_02_sfnt_off00013f72.bin
d43e7ef20904ed1d9f78e9e93a5dc8946378218e51069bc9be8c8f70128022a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F72 10412 bytes