Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d425be366b5c71…

MALICIOUS

PDF

77.4 KB Created: 2021-09-11 16:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1f1e71f3f7d2d9e55d0c0ef04b221ef8 SHA-1: d43f70cb5b4208de23217e0e3170b10fca1d2f2a SHA-256: f1d425be366b5c713ce7d8c74de6ac30d4034f345db2e064faef2be93da1c8c1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is classified as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple suspicious URLs points to a coordinated effort to redirect users to malicious content, likely for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=train+to+busan+2+full+movie+sub+malay PDF link annotation
    • http://drivescuolaguida.it/userfiles/files/59154513800.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/debotodexozogovaruvelizir.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/sewasutoxetirulomi.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/tifedux.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/92857512412.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/tixejajexo.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/66814888926.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/47463272206.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rikuwiravodalofisadowawa.pdfIn PDF document text
    • http://effektfilm.de/files/file/94179186504.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210903_0251AFB6DE60D893.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133950757435---mofefexojarotovoxezu.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/jesofopegogininom.pdfIn PDF document text
    • http://konberdbio.com/upload/files/jikox.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/xabadiponiluduvofirawiwoz.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/66376111966.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/86403306075.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/vulibikipezuriligatug.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/1008961246.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/zosuwidepopuniloxekabuwa.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/28402706901.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/pololazozilonibifizun.pdfIn PDF document text
    • http://whdhgs.com/uploads/file/20210907202148285.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/94678874823.pdfIn PDF document text
    • https://is.gd/45w8wn��,��In 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_off0000c4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B8 18560 bytes
SHA-256: 06dd06b737e54f325a0fb83bff86edce8ce50186aa19c5c765c2bb1df8a838d4
font_01_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 10876 bytes
SHA-256: d53f57953ea0c78131a42875f4c4702696ffc5243ff29b4291b1a6038a2d48f0