Malicious PDF — malware analysis report

Static analysis result for SHA-256 7101bb8b4f0f5f94…

MALICIOUS

PDF

84.9 KB Created: 2021-07-01 21:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 395c74e27af30be779b4fbb1c371e353 SHA-1: f7461eceb83ceb94237e13be8228022d81312662 SHA-256: 7101bb8b4f0f5f9495fe9b4e0bba681cb654e43516359eeda2fee1173e149106
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mimpishio2.net/contents//files/konikezijekeg.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1d133a36b1fba1b8acac0d11e4619857/19115018191.pdf
    • http://www.anclupnapoli.it/userfiles/file/nemumoreverobe.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d9b699ca---34634506752.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944aa6c90e7---jenekenevorunifotalur.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zatowomudu.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bf877fd96e8---48895748614.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/27a66a49f3f2dbb6900949992535a76a/34211407089.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8d2698e467559b5c938d3ea31ef145f/47758373313.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b7fa31dd0---temitukewurukejuxu.pdf
    • http://imhome-listings.com/userfiles/files/373311750.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52aacf4a7---gojujarujofasipixopubel.pdf
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/wezapojibiwedixesowi.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/d98b45abd20462cb86b0abc9420a7bd9/dasamomegozovuzepimizov.pdf
    • http://thegroverestaurantnj.com/userfiles/files/pidomomakanav.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d13ec12f5---83999832304.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/bf7b34c967e510e3476ba847b723fedc/luxejan.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/254833762ce44649c77a6b98db8658d4/kogafunubedema.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094774fa4b6c---42497752761.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/b7380b71a68e2586bca325e876a6902c/44319697005.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae90f7db1a8---nosifomikagepa.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733657adfea---nomunavan.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/70f5ca7ecb7724c6e7ce335230bee340/46622378713.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4r55dc6vdrhcndr9pbqbsl0vkd/pojujegariris.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a872eb2dba8---50861303404.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=minecraft+animation+pictures
    • 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_off0000e9cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 16792 bytes
font_01_sfnt_off000101e6.bin
1f42611a563d27382cf0bd3613f4813b05856588c0d63f18c74bb0e893e12b55
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E6 10688 bytes
font_02_sfnt_off00011a69.bin
4d597e70f2078c9222f50f59ac5d72ffc9e736b40d71a9d9abdca9ab295a89d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 16944 bytes