Malicious PDF — malware analysis report

Static analysis result for SHA-256 de84fd42d21bba73…

MALICIOUS

PDF

75.6 KB Created: 2021-09-25 21:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 28baf6c826027b5e5442d0fc5cd3644d SHA-1: f6be6bc3824acc3b3ff941e25e648a0f0e1d8cd7 SHA-256: de84fd42d21bba73dfc706fbbbf1350afdcff739e51bb8b3f339c163d7dfb473
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The 'SE_LOLBIN_RUN_COMMAND' heuristic suggests the document may attempt to execute commands, likely to download and run a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://cructi.ru/uplcv?utm_term=galaxy+shooter+mod+apk PDF link annotation
    • http://zjbfjt.com/upload/files/47236417845.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/jediwo.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/670523082.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161460ca4865d9---kofisatogesowafuxobisize.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/witumazuguruz.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/wesusegofuvixejipifani.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ea091e6630c9d461d447c46bb5154772/59940715880.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/f179f560f572c6b904d4c05e345ced29/75398039317.pdfIn PDF document text
    • https://blv.by/upload/editor/files/dedafonogezezukaxupetiv.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/nefez.pdfIn PDF document text
    • http://glassick.com/userfiles/file/47431642285.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/96598343216.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7297f0eb38f229a63438a149e362320d/45991646461.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/nufoxoduwivopejoxilisebe.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/xamogewagaz.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/zijorusagopizob.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/55965678130.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/88479045137.pdfIn PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/fovojelelodotulivibug.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/89770264125.pdfIn PDF document text
    • https://trieurodata.ro/images/file/89141549831.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/16990166924.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/lirupujesokiwosarepex.pdfIn PDF document text
    • http://bushurov.ru/images/files/lubosobafokarafibo.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210913174442.pdfIn PDF document text
    • http://qdcmd.com/data/files/kosewirozenojesiregamofu.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/7902815323.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_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 17032 bytes
SHA-256: 69467bf090b5f48819c51bf67b9bfe2c7b9fc51a007305d48598f480383f6f98
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10808 bytes
SHA-256: 8d9db6f8389f69d7aa0f1bad207454af2701d7d618e1e9a64a898207309eab8e

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