Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfdce7d7f2c07e6…

MALICIOUS

PDF

92.5 KB Created: 2021-07-14 02:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af0072445c062af43812aa82e3affe1c SHA-1: bd3f1305a9c086e1de71271a949c8316def5b36f SHA-256: ecfdce7d7f2c07e66ddc04396cebedf0a6a2b7d9d96d0c9c210b7d2fd7f7e79b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely to serve further malicious content or redirect users to phishing pages. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious destinations.

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 http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9430d482c33df091738337b1ec5d22f8/gujezuxapijesewumawo.pdf In PDF document text
    • http://ecohort.com/userfiles/files/difusukoses.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0d4b996741b5ba8814807baeb50f2269/37474295543.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/wizexexipitox.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/50020252855.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/4549563480.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4047c3b8---bezizopuviwevum.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c63ef97e6aa89ff0d712391db3c40f43/napakiti.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e630ff00cfa---ropegomofarelilawar.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/94860419666.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/zinex.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/b3b82ed5a36626744e54d03ba54ddae7/33080001621.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/12053750013.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/nowipejidafon.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1c26a2cd4---fodugebukuvi.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/farelugorebuxo.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/03p14ctuothr5o4ecglpv3vrs2/fivixopelusizajulekaxulan.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/59913496980.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/97166323911.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d3f3fb829bc62bba74a012d809702799/matinetetozuges.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a119281f90d---66673356123.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/mitodekalilamavawobezumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+many+calories+do+you+burn+in+100+jumping+jacksPDF 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_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 17200 bytes
SHA-256: 67f5d8c5fb62140e558a3043a1674d1722f26d319ae59237f5c3ca8d6120f73b
font_01_sfnt_off0001315e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14975 11588 bytes
SHA-256: f6d855df29cdee2759a94ec0f6e4f805bbc1156176b2453b8e376f6ec5afe18d

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