Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc12e192e39424a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-16 02:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 91d212edab4941e46c94e41b03cb426c SHA-1: e4c519f98845b70089813eeb6bc85b1ff248e5d5 SHA-256: ffc12e192e39424a8144069bbea6f7511e8da8d7f60d33a3b4d5c3ec7174309d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=how+to+have+robux PDF link annotation
    • http://mtkshop.com/images/uploads/file/lemagisegukotedikefori.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210902214716_xrcx20.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/bilowa.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/petavitanexipopi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/3961891954.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/27447689406.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85007837991.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/dumebaku.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/18755817675.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/98468714074.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613272d46a661---30471764362.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/zazawepepinarizi.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/58550001227.pdfIn PDF document text
    • http://4bx.pl/public/file/dubevupuvedazaf.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/32830678649.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/55189047708.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/68445907489.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/vezulasonoti.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/fivusexofutapubilizuje.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/kugomovarerolu.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/33678019555.pdfIn PDF document text
    • http://inphilong.com/upload/files/gojizuditid.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/sonukog.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_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 18132 bytes
SHA-256: 9b2dc00544930967e166027837365a0cb30a66e024d5a6fb9c3ac60c5800ce27
font_01_sfnt_off0001150f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 10280 bytes
SHA-256: 461f0c157eea36eefda19018d725dbbbff970c5233613f96b22c970f3bc7d0b2
font_02_sfnt_off00012c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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