Malicious PDF — malware analysis report

Static analysis result for SHA-256 69017c2bff7d7b75…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 21:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8147a777d9972d8eb53c43f88438aa6 SHA-1: 3e6e32937192424f33245ef08b51920acbdf9a0b SHA-256: 69017c2bff7d7b75d5da50add492c123b3725492124328c6a1fa67c4378b5c0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely serve to redirect users to malicious content or phishing pages, exploiting the user's trust in PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=a+million+dreams+by+pink
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/0dp6ol8r3sdes0i4u6n4rri2k1/95027402904.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607069ed0e0a2---luxuwijud.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cb19d0576---69810248343.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/xobefezijolawusukinomiwef.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4949db45---fevotisunezalujasivo.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0254e57f---39406579718.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093f5e35e9a6---mobupu.pdf
    • https://thefertilizerequipment.com/d/files/vufimokozoropusazizotod.pdf
    • http://krzeptowski.pl/file/fatikonezi.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/a46f131c653bc856df0a3414d81820b2/tulilajiwajetadurigalunor.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/lobunokisafunawinunom.pdf
    • http://www.bufolari.com/public/immagini/file/94351564271.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/5907708080.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1234658eb2---fozelumodu.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d81e79d44---tulomajuzaja.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f851b5d15---99678587500.pdf
    • http://evpltravel.com/xv_image/file/88845627242.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/cd825ac536a96863e2f88db729d3378c/lugekabaja.pdf
    • https://kermanrooz.com/img/files/gelilas.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ca8stoj1vrsnddg4u0fpvcai07/koxebomexewok.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbee2de9f60---53437712052.pdf
    • http://vejwun.cz/images/wezokoxeguwezujuxepepiti.pdf
    • http://geologicatoscana.eu/userfiles/files/3972139023.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4665dd1b1c---44812397618.pdf
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/1959458029.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_off00010123.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 16792 bytes
font_01_sfnt_off0001193a.bin
b446682161da2801e0856d3e38870c90c7783475af2c860315beab032dbed0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 10780 bytes
font_02_sfnt_off000131bf.bin
48d9683428e2c514ab7115912e4f088a14c13a0750c3d6997b92183b824a0779
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BF 17592 bytes