Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa422b44b37e699a…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 11:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a20554852f3fb3c233fac33c5114f756 SHA-1: cbe55019c7b7b91422a2f663d48e3d32413f9dbe SHA-256: aa422b44b37e699ac5edcfb5c7cfd48e5f7ec1ec57d4f385ee7b1182163b25be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://drafthe.ru/uplcv?utm_term=tennessee+whiskey+tab
    • http://studiolorenzino.eu/userfiles/files/safiruk.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n37lo58dmbsaiqjvo94o3cdmh4/70681061482.pdf
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/tukafodinesorubule.pdf
    • http://richmediahouse.com/admin/uploads/file/13547556334.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u0isgv8cv6nvo1i179374tan7g/totusikevibez.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5dfebfc9---pometekake.pdf
    • http://alarmy-kamery24.pl/userfiles/file/xavuvorevixanogubun.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e39ead33---vemowapizoviwazofesebobi.pdf
    • https://farmacieitaliane.com/documenti/file/9283163847.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/edd6d24f285bc72a2ced00ab1de472be/mexasezaruvira.pdf
    • https://anandamsanyal.com/userfiles/file/69488886278.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/56ddaf3ee448fb546b141d5b27faf08f/guperudowutedomavaluxa.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d0f1b17d7---4572137738.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/ufm7qtq5v9as393hu4oa0pkmlb/19965054223.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ca5032a35c014292a3fe259dccc2518b/xerotipobozisafib.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1608e62371729c---basejen.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2d4557b920274466b04e0c6961b3bb83/74062083922.pdf
    • http://say-international.eu/userfiles/file/ponanematazit.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5f128d17a---jetatixoriferikok.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a23a3455d---24790392141.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/4e606e7274bc87583382188a5c4128f8/funorugat.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070699c6bce9---medusisegomubipixu.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2969040b61---92595027964.pdf
    • http://younewstoday.com/task/userimages/file/nevufaxixiretepinupep.pdf
    • http://tuzvedo.hu/elemek/file/jokexesezesarale.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/vos56cdstigdkqhdidrtme7khj/22385042727.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_off0000ecf0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 16792 bytes
font_01_sfnt_off00010502.bin
81233020a429fc257512a6a8d47d5abd40831606a2590b98ab25232fa708b068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 17408 bytes
font_02_sfnt_off000132e9.bin
f2450d67ad5fccd1ed2e8d99865e1acc1807a02ce5503a2eb7a1fbaf9ceb6b63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E9 10336 bytes

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