Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f29105570a9f1b4…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 19:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 89496adfd84de07b28c4eccb42f3adf5 SHA-1: d0c5657075a903f2a4fa973369f0090a99d8e36f SHA-256: 6f29105570a9f1b4fcfb78914ef3aa669a8221cc4b930f6e675fc9cadaa256ff
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious downloads. The presence of 'download adobe pdf reader exe file' in a URL further supports a social engineering lure to trick users into downloading a malicious executable disguised as legitimate software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://empylean.com/wp-content/plugins/super-forms/uploads/php/files/qvbpf5k8a22hg6tav2ov0dtqss/lomenumibumo.pdf In PDF document text
    • http://aftckwt.com/uploads/file/semevudirapanekuratovu.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210725_174300.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760839d7734---lixegubireronabu.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/87559489580.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/wixarijifakox.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9b88c03d107f7dbbb9bf2507e27576ae/39223310938.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/53431837647.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3640c5d1b---50230471915.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/pegabixesotirovodobafu.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vlq4m01bjtvkm5apbrc5a47s74/valizamolikufimem.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/04e087fb889ab7a73f268ae717cc30d5/46038792613.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f36072799b4b68d8230e37e54d31546b/25851619924.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612344c07253c---5807380210.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1af0078e2b---51573974063.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85468d4a3f---13338944023.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/mowugafexawofanoxanolot.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/lerukerakaroxewudogi.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/vogezusunul.pdfIn PDF document text
    • https://conrays.ru/f/data/rizamemok.pdfIn PDF document text
    • https://festacontinua.it/public/file/97004800536.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4d7c4e1716d81e3e749d0fc5eb8e15e0/15469537490.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/deafb45cfb1afa961c2b10c74d26dd1d/43247277984.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/2b1354a6185fd6e3bffa2ba39c978e17/63471454644.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/75788527313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=download+adobe+pdf+reader+exe+filePDF link annotation
    • 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_off0000dc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC78 10556 bytes
SHA-256: c4a3eee0ebdfa113f3da27772ccdb15a702e660f1a2ba73f18c51ac5009d58ee
font_01_sfnt_off0000f46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 18040 bytes
SHA-256: 2cb0e699236e29b796ce65c732a6ebfa09d42db4ec7269f86ce7e8b5464a9b37
font_02_sfnt_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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