Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d351d510c9ab713…

MALICIOUS

PDF

68.4 KB Created: 2021-09-17 01:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f01e064fceda9dbec35a941d7374ef58 SHA-1: e136ef850f7fbdc1d3c7c10b793c815109362b08 SHA-256: 4d351d510c9ab713b1faaf22ea3db4dd84c58337e4e3b43fa3a9c634b27f07d3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links, a common tactic to redirect users to malicious sites. The presence of numerous URLs, including those hosted on compromised CMS platforms and disposable domains, strongly suggests a phishing or malware distribution campaign. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://infrive.ru/uplcv?utm_term=best+browser+for+smart+tv PDF link annotation
    • https://taucaotoccatba.vn/images/news/files/85031820601.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/naxarix.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/75146718575.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/tirare.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/decf6b86b4d4edd590c9bb21e6fd871a/pulunekafuviporemofudif.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8903ba1ef---sabafiramamisuwamevefi.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/sabatorobux.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/mubazewuwanizurizexase.pdfIn PDF document text
    • http://usagimatur.com/files/others/71446506357.pdfIn PDF document text
    • http://starma.pl/files/file/rupebola.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/fewigekesod.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/71643422964.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/77790522171.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/nexenugeloniwox.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee699e5810---watupotokovapet.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/sudepegalisusofoxovif.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/1584661573.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/vefubugudaliwuz.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/denojuxanatuk.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/paparefodefabizoz.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/lazomazamasavi.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/xutedolubetesofa.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/434b7350aa6a3ba14ddcc3e1332acb54/42408868670.pdfIn PDF document text
    • http://newworldss.com/uploads/file/wixuvafiwegizovezap.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/leniw.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-10/20210910045918506031.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/woxenalukurofogo.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_off0000b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 10480 bytes
SHA-256: 696a727250085a87ca85569449be1c3cf1ec1b1f6400f971b6efc06e363157e7
font_01_sfnt_off0000c972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC972 13936 bytes
SHA-256: 04772bfa27e160d92739e85e053fe0dca356ba134700fc0969e622a3dc3c6b75
font_02_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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