Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12974b30973897c…

MALICIOUS

PDF

83.9 KB Created: 2021-08-26 10:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ce611fb0298d3d596a287dbea601362f SHA-1: c0da23714ea3e83b6c9e3cd239e25936847879a1 SHA-256: d12974b30973897c8c7eab5511ae86cbe2f4ff123dbb9f200f5537aa6065b2bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URIs and pointing to compromised CMS upload storage, suggesting it's used to distribute phishing lures or malware. No scripts were extracted, but the presence of multiple external links and the 'link farm' heuristic strongly suggest a malicious redirection or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=rob+zombie+songs+in+movies PDF link annotation
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16084a942c9811---71799759658.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/50991307412.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e121b957f9c473768f308d0c9eb8c660/latixig.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53f9dc96e---povazo.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b595389c92c---66176159603.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/89720769547.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c43a647df023d4810c2b568ce83add80/dewowoditonurapusad.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/wopakajimupedalulibelepo.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/26585973866.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e28073296b6---vepidolibifikukefaremawu.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/mukoleberujuwibeko.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/6773031064.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/35403604054.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ud77r4qjj2gbnva80e43bv7d7q/tosonixusazapis.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1044653d0---98310155780.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a984fc8b88d---35199676860.pdfIn PDF document text
    • http://zxsolar.com/d/files/junonig.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c6eaa6ad4---78999675751.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/68414908956.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/garamogizeba.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/doxerejegikeza.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607fca6322286---gikawobabezuwuxinesekunaw.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/72669324042.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c816eb48ed---rutiromozusi.pdfIn PDF document text
    • 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_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 10356 bytes
SHA-256: c2ee431e50c3f5e05664c689d49c383088c0e95969c2a5c0a18500391e64fc3d
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 16936 bytes
SHA-256: 83d747962f4eda934a2665952c58d2888087ef3c48ce19fad0c9d9836d57ce9a
font_02_sfnt_off000128fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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