Malicious PDF — malware analysis report

Static analysis result for SHA-256 512b60d314253f01…

MALICIOUS

PDF

87.4 KB Created: 2021-07-16 23:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2fb3afc7e2e67e153f8595515967249 SHA-1: 67ba3ca621a6f8417428ca612da9ef3cc9d8b2dc SHA-256: 512b60d314253f012509c3de3c23154a9aa80d3a9b73f18b46faad3e347eeebe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://al-farh-iq.com/upload/userfiles/file/71756713811.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f9ced1d6c---37367297839.pdf
    • http://abwpetersburg.com/uploads/files/rebavamanafixuwas.pdf
    • http://didopack.com/files/24577311568.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cp3hensvpv8tfml4qmk299recu/86793330617.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f9efae75fa56d68b1865a812a15905ea/geruwosetovusuxipukuku.pdf
    • http://cuanhuaabshanquoc.vn/files/4630178040.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3e779fc8---97535160471.pdf
    • http://banghetretruc.com/media/ftp/file/difajofanojapuxo.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813e9f5e755---zerilezabovojixivopi.pdf
    • http://faradbox.pl/files/file/82848990863.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/3cg0qqq3uq1vm6gibvhb7439pi/33815684354.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/341875dbb52e92b0acf41b09a8102b47/nofanusepisif.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/sokisawo.pdf
    • http://datavincity.com/uploads/ckfinder/files/27586674601.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8be5627f---pojesop.pdf
    • http://piri-piri.pl/ckfinder/userfiles/files/bowatutoza.pdf
    • http://sjar-tech.com/uploadfile/file///2021051820094348.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ca927a3e81f8f3c08080690134f2370f/gerudosogen.pdf
    • http://fitviewer.biz/files/file/45085463554.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/zodefajov.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ff8583057---fexovilarofunawudilosaku.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l9pol6msn6bpehfjhkafpd8cv5/merotaji.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d4a9d82d8---27887761424.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/405ed36efb402c454275e434f29936c1/gubukesenaz.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/74dcb45bd0ad2384bc1a32ed2afc3879/1243576740.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=2+5+10+times+tables
    • 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_off0000f476.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 16792 bytes
font_01_sfnt_off00010c88.bin
7334ebfae556796fddd376a3e42561ab6eed6336372c9dba9184dead149eee09
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C88 17056 bytes
font_02_sfnt_off00013881.bin
402f5587af8f41a4522f9d1e576f477c864523931ca19f5d0b49f16f27726486
pdf-font-stream PDF embedded font (sfnt) at offset 0x13881 10416 bytes