Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc42e0c25ba1cf8…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 17:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 184ccb56da26751825beb79ebb06ee79 SHA-1: a898776ed407c56cd7bc488b2565f88f7135be0c SHA-256: dcc42e0c25ba1cf88f92ea96a52a94124a8815c3c38d00c661fa05fd671a2b5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://catamma.ru/uplcv?utm_term=redeem+a+robux+gift+card PDF link annotation
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/810994e3a889be11b422e717f4c485ea/92641096157.pdfIn PDF document text
    • https://clove7.com/userfiles/file/95497212050.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/94967302082.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/31094225971.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d188bbd4cf---kuzexapagurafukakamam.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5ccb0db8---61488016889.pdfIn PDF document text
    • https://securitydm.com/slicice/file/23601749685.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/widapojozunavejiraxoreweg.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/4h8v3roaref05unlqibmo2bbq3/mejodegemalitom.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a36d8ca1cb---37613369340.pdfIn PDF document text
    • http://calebdobe.com/clients/875189/File/sosuluzabowikerowuxe.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16100add42e619---tukixojogogudure.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6b1cb4e5e---67733469479.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/vanibozoda.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/1564067daa142bc0a35d9a80545886ba/medemavituwivan.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/zovosoxuwuvivibuxajotexu.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/44875259383.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/151954435796.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161203081bef1c---wonaviroxin.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5e8dfef12710e38a2b950c6573e9a5f1/36606435360.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd415bf587---67666070135.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD310 10888 bytes
SHA-256: 30b404eb17f48f6782e62062d2ee23f88621f59cd5d2a747f5ef745808d6cea2
font_01_sfnt_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 18520 bytes
SHA-256: f15f20804402399d8231ac4d4193eef455c08e21c25665efde81c2f02d478745

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