Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b02a74bb0ec73b5…

MALICIOUS

PDF

71.5 KB Created: 2021-04-30 01:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57c17a237b09e7cc2b73e2fa1e3173ee SHA-1: 6fbb726f4faf5988bc39dd50515efdb48b84131e SHA-256: 4b02a74bb0ec73b5915b49164c5e4285c31b88939b0f1b7ab1a7cb65f63e9442
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage, suggesting it is part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a lyrical video song, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075df470c362---gokow.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085963a50098---75401310306.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e323b9326---85003041004.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/2e5ec3b264cb5431ccbef803a4d7e3bd/reripafisax.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kpvlf8vc7bmq16jhe12k36tc25/4889689378.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/6d0bf4a18749b0873036b6d1b34dbaab/kusixabijewod.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ff5ac3a1c6595d125e9a0c7977c9fbf2/26267033964.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b8f14264097260bf943991565134ab6d/53177139509.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7f652937ad5bc2d502fa68204c9e449d/72360928351.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878b89e3176---suretinejipojaliton.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/db434f2d319d1e3c303f64d051b120c7/wubavijabusewu.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd0468623---tazosit.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8bc6a29da826da27c4f8ca99b15d9868/14222846716.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=arupu+lyrical+video+song
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d916.bin
de60cb2cd011b41826d06272f750b56b89997591fb94a7dba717824f4024deaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD916 5392 bytes
font_01_sfnt_off0000eb90.bin
cfbe378848e274aa6bbedc44fd2d4c7fdb0fd85a6d772ce94f51be52d22a34ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 10880 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.