Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e504bc1da3cbbbb…

MALICIOUS

PDF

75.7 KB Created: 2021-09-05 00:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b097f1b45a474938e984ee35531a8e0d SHA-1: bb4abb7b713419f12644972d4e885bab681b4898 SHA-256: 2e504bc1da3cbbbbf7ac7fa7e9eb2dcff26cbc804308b9981d30f05ccf6379f3
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 critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and link farm indicators suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://bachtungcompany.com/upload/files/xerufimuzivaregazatipaki.pdf
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/8312695914.pdf
    • http://lagunaapartman.hu/images/user/file/jikomaxafete.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/texakesejifebubibezuj.pdf
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/55293901442.pdf
    • https://kuepancong.com/contents//files/vudeveduxin.pdf
    • http://dzbnf.com/upload/file///47680453192.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496fb25e97---66256536514.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b135c772f---80762936263.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607370d82a495---gazebabotixomad.pdf
    • http://www.asslar.de/downloads/rejuvujapoxo.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/vajixomufapisanisife.pdf
    • http://szzxwx.com/Upload/Upload/file/20217152053581325.pdf
    • http://mdsalon.ru/img/lib/file/xudejofujovodomopufebago.pdf
    • http://01host.ru/userfiles/files/bosamusagoligijido.pdf
    • http://brandnewgoods.net/userfiles/file/pasujenifunukewunititok.pdf
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/88034770194.pdf
    • https://rm-parketi.si/uploads/tarada.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/d5ee96f7e70b93648527ac0674fc2376/89299857966.pdf
    • https://mysmartedu.com/uploadimages/files/2263673735.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72557f08ee---91875328584.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/51829151243.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756a6b7cb59---fefufebex.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=environmental+law+notes+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_off0000c121.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC121 16792 bytes
font_01_sfnt_off0000d933.bin
8ee697bc955cd0dc71e254cafd7d4b04ae5f2eea52ce13058014029e6b040b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 18480 bytes
font_02_sfnt_off00010876.bin
9377f986bbada1da2ab5ec0f0b198f3bd2f7b654b1653a9ccd50b47259d64beb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 10796 bytes