Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f71703819426fce…

MALICIOUS

PDF

79.9 KB Created: 2021-08-13 20:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9b113790b6682536a47b13ffc3d8debb SHA-1: 5238f749481c1e9037c29b0747741dc59f40f45b SHA-256: 6f71703819426fce0e3f46643b52aaa14e1259dad35518ace0d755226733b56b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised websites or domains designed for link farming. The primary function appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://royal-pizza.eu/files/file/jugozeruxuwibetorejakido.pdf In PDF document text
    • http://tw-go.org/files/67837951408.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/58600181986.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/rejexajuwewijenulom.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/l7n3815nlthq10jdcale7b9t0h/82905416688.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/1897058777.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f32b1199d8---laxuduzoxopatibejewi.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/24792735811.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/5k0qcesn4062dbcvc1ugk15dgb/75500306948.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/21812292293.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/2707978301.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/vopopefowalusabupoloz.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/43487531816.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///346434946.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/julero.pdfIn PDF document text
    • http://learningkey.org/userfiles/gijuvoje.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/mizovofegi.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/zitenepoxojuzibegadisel.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210724112913_rhrzyv.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/891dd2041adf77d1d76c1c74a4efcee5/pebewagutot.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607086da800b1---53250988806.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/19354504995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=tu+aata+hai+seene+mein+song+downloadmingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC099 16360 bytes
SHA-256: c77aee748216373e76f79e9ec2d4668efe3d4317824bdfd2b8031fa3a7d54d2d
font_01_sfnt_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 10744 bytes
SHA-256: 066e75bf92923607abb7d50dfe4d5ccb693db71e6a6e1864fbcbf12292125f0d
font_03_sfnt_off00011bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB3 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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