Malicious PDF — malware analysis report

Static analysis result for SHA-256 8562860a7272d66b…

MALICIOUS

PDF

84.4 KB Created: 2021-08-10 04:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5dbf46a1f8551a0a0e7dd1629bb2187c SHA-1: b5b7466e246d05c14b9bfbe44ebd587291de2767 SHA-256: 8562860a7272d66b23de48a2077f67587f012fd86d61c0464f547a66ad1612d6
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary attack pattern involves luring users to click on these links, potentially leading to further compromise or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5f7aa9a5999194f0970f58601652a591/40075098906.pdf In PDF document text
    • http://csc0532.com/userfiles/file/20210611154334_u8l1gn.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/44d50dce0d73531aac328c573480191f/8137727321.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/lunito.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/gegevowinemukipod.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3f831c1e---20319322797.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/51791810825.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/fakosewoserinegosejuvike.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/mudelu.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/pakodotutomaso.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f8e6727daa8f62dc9e730903f41f59c0/67233499615.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/5681749824.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/zameku.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ec12742baf2e847940018f2aada5b41b/49738199518.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/6f97969f6e836db9cb0280e2fa437a4b/84700388663.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/cfc185eb6c47919dedef451b390d958f/65541723744.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/gaturin.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/vewosojega.pdfIn PDF document text
    • https://congchung7.com/upload/file/67684539062.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/46690505622.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610802d59d7c8---namolikesofatiniz.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090edd436320---kogij.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/84271438427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=gibi+turma+da+monica+em+ingles+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 11244 bytes
SHA-256: f371d3691a1d82109e39a005d1795785a800671c39ea5e747cea3d3b4016b1b3
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 20084 bytes
SHA-256: 6b2ffcdbeffb759e525481ea213ba3aa986e0a3c426877315ffdda03aa41188e
font_02_sfnt_off00012ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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