Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d2e9d6553e669d…

MALICIOUS

PDF

87.5 KB Created: 2021-07-06 01:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d07dcf8c8f4169c36b856bad6570fd84 SHA-1: 32ddcd87e6a952d1ff55496c1e48af846b93a635 SHA-256: a7d2e9d6553e669de90753c55fa1246008d83ddad1189154377d3176ad855953
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://alexanderkanevskyartgallery.com/clientMedia/file/39854542845.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88e1adc0d---86286374802.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160afab8bc352d---nurirota.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c7b2e9775cba6d4ea4473fe4fda6a9b2/desivuzagex.pdf
    • http://vietthanhstone.com/images/news/file/41799704792.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/od9bgp40h4ru2itip1u8nd9r75/figufexekux.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/36381293d5d5f6dd4427e340259e627e/pozipik.pdf
    • http://botosani.ro/img/uploads/file/palamalixujamulenazebiped.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087eb588c79e---25551085944.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd9320cb4---bofemimesozovij.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d51cd631cb33890dcf71052e83ec02a/99262153283.pdf
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/nf44pvm17cmobqngf87nbg4vg7/3458866560.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46adb1ef3---xugowipoga.pdf
    • http://bularz-auto.pl/images/userfiles/file/18339056169.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/83145c46407d8a6447e548530c4eb525/95440344967.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608df143c0cce---dikupesawibimavevurin.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/sumiwuxubefufujivale.pdf
    • http://csc0851.com/userfiles/file/20210607080918_60k4uf.pdf
    • http://heureka-cz.eu/files/31936896069.pdf
    • http://wooshin.kr/uploaded/file/198545419160cdc2680b872.pdf
    • http://korvet-sp.ru/userfiles/file/juvazojuzulilokovotap.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607917675fb86---9133200443.pdf
    • http://elsekmont.eu/userfiles/file/91756077147.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=murder+in+the+alps+unlimited+energy+apk
    • 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_off0000ea11.bin
64d2a6331b9a4be1bbc7f9bb67b145ac70618d42ade428544855c7e19a576f6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 24980 bytes
font_01_sfnt_off00011f9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 16792 bytes
font_02_sfnt_off000137b3.bin
9e66aa2843b30722b835ed5abd92d0c95b9779401db4385cbf881a1448ef226c
pdf-font-stream PDF embedded font (sfnt) at offset 0x137B3 11016 bytes