Malicious PDF — malware analysis report

Static analysis result for SHA-256 2456095da92ed3d6…

MALICIOUS

PDF

85.9 KB Created: 2021-08-05 03:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd7127b18bea32f39fd6968622fe2975 SHA-1: d720e6010f4c2541e8c732525a97c298bc890a3e SHA-256: 2456095da92ed3d6f0fbbd933035b23003a97aa8f585c020ae5f0ec8a8ced8b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to phishing pages or download further malware. The presence of external URIs and link farm heuristics strongly suggests a phishing or distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://pixomot.ru/uplcv?utm_term=rgb+led+strip+driver+module+for+arduino+code
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/58a757dc60601160efb8de1b1a471c58/754231047.pdf
    • https://nevisnews.com/userfiles/77780595700.pdf
    • http://brickchamber.com/ckfinder/userfiles/files/25113580398.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a57bc0dbbd9---mated.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e20e09e6d39610276743b77d820a6ea8/kadafekomunol.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f1da005fcc6508afaeb3b89efba8a01b/93358506210.pdf
    • http://euro-ex.net/images/blog//file/wirewom.pdf
    • https://mimpi1pusat.com/contents//files/jutumeli.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a2a9e6032---15054178322.pdf
    • http://metabolit-plus.ru/files/file/41509702258.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/i6a8plisgk065ifrudjijtp48r/narexomudajogakib.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f141d6bab9d---gikunusu.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/19001868435.pdf
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/firubobegadez.pdf
    • http://huile-de-nigelle.info/userfiles/file/74139662919.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/83setsgcgi5jslje0apafg01c5/fobuzovewifenotuzog.pdf
    • http://usateatop.com/_upload/files/99279596183.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb6acc1d9---29214741349.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c063d1d75---panivovomumejigazuxemenuz.pdf
    • https://alohasafaris.com/files/lugazijavufasimijubuzat.pdf
    • http://hotelamadeustorino.com/userfiles/files/34238354211.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e82a4f961a1---17573125948.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96a98b828---1725449253.pdf
    • http://studioboscono.it/userfiles/files/78873934978.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_off0000e9e8.bin
6c5ffd1b6ee779778922139d8c886a21109d5cbb134dacb7664ff38e0687a12b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 17004 bytes
font_01_sfnt_off0001169b.bin
c39801a8c004c50d139a86bf8d7d2a65578e8f59e6f051ede8e85a6919a7b1fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1169B 11312 bytes
font_02_sfnt_off000130cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130CB 16792 bytes