Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b2332c39da39b2…

MALICIOUS

PDF

76.8 KB Created: 2021-09-12 15:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3aaef341caaf677f38b041d222087487 SHA-1: 0e4878d3ac1f20dbb2038005609cdb4dcaffb29d SHA-256: f9b2332c39da39b2536e5e0da8f5a362fc9f91a1ffa7aea211107637d826ccf6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs that point to a link farm, suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of a disposable link farm heuristic further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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://asid.rw/userfiles/file/85263219434.pdf In PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/61872127078.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/bejerupu.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/16264477564.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/24677087254.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/tizobasuxewiponufapibud.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/30756979792.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/difimatevoti.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/zegomenebituxonedokev.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/rujixozuwideduxaz.pdfIn PDF document text
    • https://tckontrola.hr/files/ximutobixudijolotu.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/gapipuk.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/29157319909.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/fepomelivuti.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/pezivefaramifex.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/vevufefewusuluwajole.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/70421128482.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/sotaxusis.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/aa5095feb82667c44113c8f30a84c5d9/57507972975.pdfIn PDF document text
    • http://www.polni.si/Images/files/zuxude.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139987d0fc57---xokepazobekexudusobe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=grand+truck+simulator+1+mod+apkPDF 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_off0000c704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC704 17904 bytes
SHA-256: 7b4764fcf8b6f4ab9bed6291b429b33d6b22e4c092e64bb44628967f015a2014
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D50 10828 bytes
SHA-256: 116724db59e0ef7bc3ccc631d3b7b92d11a82d430a0c5b6d5b297e913e45184d

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