Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e0ab48d76bdb0…

MALICIOUS

PDF

70.3 KB Created: 2021-09-07 23:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 55aa3553b866e17af6bf3d74bb821084 SHA-1: 0b7ecf8255bb59a368659e6d2d294daef787e784 SHA-256: 6e7e0ab48d76bdb089eadb4b8370a2afdd3e68a9849412fc3df539a5a266f749
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The primary purpose seems to be directing users to external malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/rabafakurokoganepelug.pdf In PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731c376d95e---nisigawixomoki.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/sofudasimudubuguvovix.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/39919705864.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/67974695329.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c848ef530---tifisovudimawej.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/84204465243.pdfIn PDF document text
    • https://olterus.com/contents//files/35097701242.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba74a3dca---jutebumoxufusepig.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210818141938.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/44649780119.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/vumuluxevowexozapudaxodal.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/berepiwuzajifo.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb1a1110f---xowepajomubisaboxibumu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c9ca794bb---74276053902.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/tozutakagajubisep.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/9995087908.pdfIn PDF document text
    • http://446888.top/userfiles/file/vamopalafilisabe.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29456577846.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/mofiwenesariwinumafofis.pdfIn PDF document text
    • http://mfahk.com/upload/files/82682937135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=2016+acura+rdx+service+manualPDF 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_off0000b187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB187 15968 bytes
SHA-256: 70494f4dfe197c3f4079240e4a036f4f4e0ab2559adb2045a6b473b62da1a907
font_01_sfnt_off0000da69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 10944 bytes
SHA-256: 56f1c023d017f3d87678868b860eb65932a9a11550b7b5f0c816ed879883e9cb