Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6d5fa86426f46c…

MALICIOUS

PDF

70.4 KB Created: 2021-09-26 06:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 17cfba6096466216db1bcfdb38d311a8 SHA-1: ccc311843b5dcde1ec3512f66dd4441c6ab20f9b SHA-256: ce6d5fa86426f46c131d6bf58cdaabd20a5649dc18ffbf9c0fa1dab3aefa8eec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The PDF contains numerous external URIs, suggesting an attempt to redirect users to potentially malicious websites for phishing or further exploitation. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://crysiq.ru/uplcv?utm_term=iphone+12+pro+max+gps+accuracy PDF link annotation
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/40718046375.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/peviw.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/jusetegufobumirobudefiwe.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/zoxase.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/vemekagovaridule.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16135dab766000---vogota.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/tobinopifusisozaxeg.pdfIn PDF document text
    • http://salespate.com/userfiles/file/8009867803.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/fapimagajamizagig.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/95275667297.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/nererabimipaximexoxade.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/samejuki.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/21846951136.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/58477594412.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/xijilazavutegew.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/dagadeze.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/70816619625.pdfIn PDF document text
    • https://kimansion.com/uploads/file/gakanepe.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/83499499418.pdfIn PDF document text
    • https://salwangurugram.com/files/11748133832.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/57739656750.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/86007585855.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/vonufetekiwebeluvato.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/naburagegunabixaz.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/milukapujiv.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_off0000b069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB069 11024 bytes
SHA-256: 7cc28d5bed7ca4e2412b22a5367a985b0dff02902705dd620f17bafbc8f45fef
font_01_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 16400 bytes
SHA-256: a2dcad149d819318d43bd02100b35bc5b30b6312c0466e1dc31f943bf390c9b0

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