Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c6022ededd4e15…

MALICIOUS

PDF

117.1 KB Created: 2021-07-20 11:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b04aaaba55d6a7a990dbb917482695c7 SHA-1: c9233856e062adaf7f1438c6396036f0ed6b8c6a SHA-256: 80c6022ededd4e15d729e540101ed97152e162a28b302ed5619bf4612f391746
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites hosted on compromised Content Management Systems (CMS) or utilize disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

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://total-sport.pl/img/upload/files/luterugosojo.pdf In PDF document text
    • http://lucann.com/Upload/file/gexelodilimenemeseru.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/799557db4df8d4fe1902604745b509e9/nubimorisufezowev.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/99082279946.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/33262834430.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6098ac5ff3---49082163321.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc4e803ce5---rupedawever.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/egvq27cth2ko3gmhpgp4pmjjbg/84275022763.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/6cbak9q0sc5u41agrvljtc2tcf/52403390669.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16086f1ca18c21---jomosezuxidev.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3206c80479---66335833878.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608323b7618ea---tanotivajof.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973bd66abb3---96985814493.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/rofurusiv.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/49266955127.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/falatudupivejisa.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/vo81m4dk5tmrt48283856mv83u/gugesatuverajefurudapab.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/21551475161.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/77r1sshllndd36rl4g5efpb7pe/duvoxesuwo.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/gagine.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d5e6b8c7a2f3901c54348974729fbad9/vivananadikajir.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/57477701897.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/boh6lmirfjjhdl934bndh11kna/23313374423.pdfIn PDF document text
    • https://zzhqhi.com/d/files/susilovam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chinese+to+korean+dictionaryPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A18 20780 bytes
SHA-256: e5a0dc3458a6c3e76e1c6a2b483a055225ba55f5b81ef61f110aa54ca54a060d
font_01_sfnt_off00016e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18669 10660 bytes
SHA-256: c72b5003338cc1757c68d4a842daa9327b3654eedde0c9d2a8a21ebd6260a07c
font_03_sfnt_off00019edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EDB 16488 bytes
SHA-256: 43dcc9b2a7a37270f67f6fa901f86c04a98b24a5b1734c23b9245515840d04f9
font_04_sfnt_off0001b5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5D7 4200 bytes
SHA-256: d004472c534b2cb57d453da453bd462ea68a568f28cb31efa71b1e4ad5b073c5

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