Malicious PDF — malware analysis report

Static analysis result for SHA-256 1183a3c6816375ff…

MALICIOUS

PDF

86.9 KB Created: 2021-09-13 03:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7fe1edcfebf011584d48f03cce650c41 SHA-1: c4ce1e36e07e66c7256f6eaa37d3e4afc3651d9d SHA-256: 1183a3c6816375ff07355f45df2392df3e514745c4150ea832abc678e0f506f5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the nature of the heuristics indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/efedae4c19cd1a9106fd91f203c73caf/58760302271.pdf In PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090904511993.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/79eaa4432f0588291d35b396c8a34dac/6532735303.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/kikezofopufutavi.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/teximazugexorerupaz.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/jolifupimuzusepesineza.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/zuwadogupibeb.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/volap.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/96300389738.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/tajesifoduvuzimu.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/66079495918.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/dusewarijadezotofa.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/42746040874.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132080e86bec---vebedofoseteruk.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/mevosafapawiza.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/fv83rsodju8npl5033qoi4lhp3/wativajopi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/vijamusav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdfac31ec0---64938688041.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/59389410619.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sizikudipubovodorovut.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/71213279952.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/fomususedamuvarodevikure.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/44259401752.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/nurupa.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/45875081466.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/sitetigunetuvofomisok.pdfIn PDF document text
    • https://rjpexport.com/files/31116547103.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/17266782429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=can+my+android+phone+be+hackedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 17620 bytes
SHA-256: 75bc48f286312b185d9f27251df36426fd01c001ee44e190533582389ffbeb23
font_01_sfnt_off00011d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13528 10844 bytes
SHA-256: 64494e872ecf4241f86955be38ab51d5a6f844be1a75689ed89a3ab4dae76a60

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