Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fade8b7f7e4ccd…

MALICIOUS

PDF

94.6 KB Created: 2021-06-26 22:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bef4afdc65748e71097e52c5197afe4 SHA-1: ae8dc0bd06dc4e37d58b3799c37be10861fa6a08 SHA-256: 58fade8b7f7e4ccd76a26f176cbcb11f2deeeff1729963846903e3741305100b
176 Risk Score

Malware Insights

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

This PDF file is identified as a malicious phishing trojan by ClamAV and ML classifiers. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pattern, although the document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/88clgjr6ncdvvbbcp4pfic4rfa/3715859726.pdf
    • https://lawina-radom.pl/files/file/wotoxusile.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8th2rhpm0aejtfsh6esal8vk94/58655706579.pdf
    • http://davidhammerstein.org/userfiles/file/levixapiguravugalawojewog.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66c52e939f---banafuzenaluxivemiga.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acce2e429f4---dazoregegefetekixawidolox.pdf
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19708599909.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3620a739---63798175608.pdf
    • http://zulassung4you.de/bilder/file/rurinenutijadorosomukimuv.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/8ad1c37ce75c83cd5cb05b467a09c8b3/nunuvubivagamoliris.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e4b9ccb7648d4bb057bc735b138432ec/kibujabenarabosulaxanusar.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/5r4tp18q1nr1uuccs4ucjsnjqa/suwavedupadog.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/dfc632e0542feab2fa96d983b72d50b7/99169238783.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20b031c06.pdf
    • http://sibinetweek.ru/userfiles/file/69943501753.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/71917978760.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/kudifawazifukitupusodube.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/95942273185.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/1dfd4e86f314c593c2523f36e478e5c6/vamusigat.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4f9ffd8a722a5164860b3326b43490ec/46519353646.pdf
    • http://asbufestival.com/uploads/FCK_files/file/sasodunuzu.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/t4m4bc74eie6oivl4dpjrauv50/jegimekanirolaxapawi.pdf
    • http://ufnk.fr/app/webroot/files/file/35308738422.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b3c237e4---58655413152.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084efb8e3b10---febogovobuxepux.pdf
    • https://muguet.fr/sites/default/files/file/porakitedinagemonilugilar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+jobs+for+the+future
    • 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_off00010fb4.bin
31c623cec7e9647ab8874a07eeaf76e7e160afa40dd50b43053f4d737312437a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 17624 bytes
font_01_sfnt_off00013d84.bin
ace37933fc881d6baf3c40f884a1accc75928103e0b53380d7844b92f24cc1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D84 10328 bytes
font_02_sfnt_off0001550e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1550E 16792 bytes

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