Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb2e15bc2eeb72b…

MALICIOUS

PDF

98.8 KB Created: 2021-09-08 10:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf805556b99a4098cc02499f9d7510d4 SHA-1: be5c704ce4f5fc38d2c31f4c4b17d5be477e7743 SHA-256: bbb2e15bc2eeb72b1131c93980eb779173a77b19f3e834a9c2c615daa1d593ae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to host malicious content. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a deceptive lure, such as a fake invoice or payment request, to trick users into clicking these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8978d4a7c5---64209329952.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4c331bb8e6a167ff29676fe5abb1420d/43284781852.pdf
    • http://hankyunget.net/userData/board/file/xuwepekure.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612de59fab99c---35281996664.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089011577f6c---47385959995.pdf
    • http://delannahotel.com/user_img/file/75021691494.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3acd8b8eb---daxavogajetij.pdf
    • http://tareeapartment.com/user_img/files/dumuzagixurexomitotakizen.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d791b42e---44350183780.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ed1a047859a2489c38a3d715029bcff5/fofejamijafimatokemisuji.pdf
    • http://dtpokebar.com/uploads/files/83751897962.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114464eb8032---ragoju.pdf
    • http://rafaelokazakov.com/file/jorunetorebisoso.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708570af631---78968743926.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c3964186e---56232368384.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2442a7b8efa54bf9c8cd9fc704e3f97c/resajeninozozegib.pdf
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bajibarobuko.pdf
    • https://szabobuszrendeles.hu/files/files/xamidujavoroka.pdf
    • https://dm288.com/slicice/file/1943458247.pdf
    • http://baaningdoi.com/file_media/file_image/file/wadoxejoxofun.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/18275698792.pdf
    • http://dinskayarealty.ru/media/file/loninexilesolim.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9009283f7---julerabugenatopetive.pdf
    • http://studiotecnicodama.it/userfiles/files/gajuwojipefutap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=rrb+si+recruitment+2018+notification+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49b.bin
581ee6410b39f3fc3c0b7eee44a1f688a16d32601ddb4ff915e7da4a385d4a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 1936 bytes
font_01_sfnt_off0000fd8e.bin
4204f4a647e3e8488fc3125e36d68471fcc515b787f7ef36a685bb1e406e82a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 16104 bytes
font_02_sfnt_off000112d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D9 16792 bytes
font_03_sfnt_off00012af0.bin
c87c4e676488fa27d87cba240f7fdbec7e8700967f6b71cb9bdab64f271e9f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF0 11524 bytes
font_04_sfnt_off00014623.bin
46d7a8d73e76629d7f0dcc42c4cf9a8574d457bd3820a9dc8a236bfcea9ec96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14623 20960 bytes

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