Malicious PDF — malware analysis report

Static analysis result for SHA-256 3705471d6a8c1eda…

MALICIOUS

PDF

71.8 KB Created: 2021-09-24 17:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54abcd78d991e630e0371d3db2ec628f SHA-1: 62323b348e0e88e0136510c4be2c508c5ba121db SHA-256: 3705471d6a8c1eda4e4048a02fa257f17a96736c9e2d87382d3b207dd10a7064
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised websites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/fdnr8c015n5c8em75sq8b1up3k/64657385792.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16137d34287dc0---32119221107.pdf
    • http://riccaassociati.eu/userfiles/files/pifotovofagirixijetojiriz.pdf
    • http://divelife.kz/files/file/kotusebekoxabelafilu.pdf
    • http://abwingstop.com/uploads/files/68661173155.pdf
    • https://nadrozmerne-sklo.cz/uploads/dofurevuw.pdf
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/79257879820.pdf
    • http://pc-driver.ru/userfiles/files/94766368897.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/68536353466.pdf
    • https://szelvedojavitasmiskolc.hu/files/files/29178077653.pdf
    • https://waxparadise.pl/userfiles/file/tujusujufuje.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/9445e5b19ec10ec7be4683199e850aa4/13696879065.pdf
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/kawaxavewozupuwusezaseg.pdf
    • http://cichanski.com/Upload/file/5213222284.pdf
    • https://themis-lex.com/userfiles/files/senefumusowote.pdf
    • https://lolakarimova.uz/ckfinder/userfiles/files/8543177587.pdf
    • http://lapenya.cat/imgjovesnaves/file/64755936833.pdf
    • http://chinazzjx.com/d/files/bopuwiliziwiderilujuxe.pdf
    • http://baovecongtruong.com/upload/files/84663099672.pdf
    • https://pankajplast.com/ckfinder/userfiles/files/selerizugodogorifisig.pdf
    • https://dobski.pl/userfiles/file/83553018708.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136fd174659e---gaviberapofofefi.pdf
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/20802972072.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/06f1a7c5a0224c2f712605741dbde252/24515900994.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=record+video+in+portrait+mode+android
    • 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_off0000b3b8.bin
29af13d20e9b3d828db408c0bdc5db86423c5dc40ccaf38c416fd69ef84fa5d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B8 17228 bytes
font_01_sfnt_off0000dfa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 16792 bytes
font_02_sfnt_off0000f7b7.bin
da4c6f15e7f8c0ff1db7981dc43a556f1359dd9433e4648ed7ca04e519c504b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10572 bytes