Malicious PDF — malware analysis report

Static analysis result for SHA-256 950e8fbe76919773…

MALICIOUS

PDF

86.1 KB Created: 2021-07-02 02:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fae61ad8937c8a9cc888c0aca45dd315 SHA-1: 06296c84d522aec2651d30dc06dd27c715afed79 SHA-256: 950e8fbe76919773bcada234780daa73ccecf68febef9bd28196f841765ebd98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 that point to compromised websites and disposable hosting, likely to redirect users to phishing sites or download further malware. The presence of multiple external URIs and link farm heuristics strongly suggests a campaign to lure victims through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://garglob.ru/uplcv?utm_term=auto+theft+gangster+mod+apk+android+1
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/m29a12mjalo8vdf1fdmmajjhh6/10836857330.pdf
    • https://theatresaucinema.fr/uploads/file/71677153183.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22ec5a41ab---85045171155.pdf
    • http://al-bandak.com/userfiles/file/lawuzoregewate.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8787bbc67---6271926656.pdf
    • http://heninrealty.com/userfiles/files/21846611354.pdf
    • https://vietucmould.com/img-vietuc/files/72919549931.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160795001a9054---pajinufi.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160745ec74c941---karewisa.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/bfadf601d6c0557420e98187ffd82e5c/wixatijipuzejuruxane.pdf
    • https://betalinktech.com/blmedia/file/sepujolunejudovada.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8757677f4---tidavajexuvesukil.pdf
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/71678689984.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609efab88582a---gifanufozosokadipizom.pdf
    • https://addsfly.com/userfiles/file/48168483335.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a649966c04---66374527937.pdf
    • https://atcotourismtravel.com/userfiles/file/79727360803.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a1072615---zetinavexirokuzomolabax.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ad511f813c4---29056998465.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/2e39e3b82d6b8549737292ca630f04f7/42254225744.pdf
    • http://ezstreetautosales.com/clients/876244/File/surosemimizibi.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/bcn6nj9c6ffvhm8sa6r9khi07k/zifolepoxamakezuburupeleg.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b6.bin
6db0f6aff302517959e771341526719c7cb0bccdb624e9d69e423217ff3f1916		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 16272 bytes
font_01_sfnt_off0000edc7.bin
c0d77551eef2bd84ee8a1748552d61abcbadd242a3ea8b7879420fda4791ea08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 16548 bytes
font_02_sfnt_off0001190a.bin
94de44d8fb9e842fcb1a05bc2330f40c00aaef50271fcb731e7126a9fd6b101b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 11124 bytes
font_03_sfnt_off000132c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 16792 bytes

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