Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fccedf65e2ac5f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-19 10:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 27b422a47f0d4cd028860c68d6f87f06 SHA-1: 43783dc4480ba3db3e709be56344ab98414e07e5 SHA-256: 60fccedf65e2ac5feed8ace2a19d4e5921637474cbf8d8bd815eec259443a16c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. The heuristics identified it as a link farm with numerous disposable hosting links, suggesting a lure to download further malware. Although no scripts were extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://hoinhikhoavn.com/img/files/21203438059.pdf In PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/38197792678.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613942154c21b---vipokulekirunavete.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/kijit.pdfIn PDF document text
    • http://reichspfarrer.sk/file/95363241676.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/punazofunepajupuzivipoper.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/xawas.pdfIn PDF document text
    • http://klenderbio.com/upload/files/darinesik.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/38528364889.pdfIn PDF document text
    • http://svx.su/ffile/file/19487420551.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/rakogu.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/baraluful.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/zakabuzefagowitepavemibe.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/pezokiw.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/42223470198.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/69469774949.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-12/images/files/85303875138.pdfIn PDF document text
    • http://sieuthibds.net/images/files/55202675039.pdfIn PDF document text
    • http://i-physiology.ru/upload/2252465087.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/vusewenalipubaxexor.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/84124838316.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/zebofavevovuva.pdfIn PDF document text
    • https://sentralperdana.com/file/66746580947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pokemon+mega+evolution+game+download+gbaPDF 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_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 10808 bytes
SHA-256: 82b703050695ba63e64502eab209729963f514d317766b46e2c712682da602aa
font_01_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 20940 bytes
SHA-256: f3d7dcb9ee70418ac69bd228ec383e33512296b7ad940a5f714e3db3500e1732
font_02_sfnt_off00012d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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