Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d5a663d32d74b3…

MALICIOUS

PDF

73.0 KB Created: 2021-09-11 03:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0625749d87ff4f405a3ac6c782ad84a6 SHA-1: 9d9151ad3ccfc6ea1bfc442c223feb4cc8a85220 SHA-256: 75d5a663d32d74b3e91711e3739bee15fa824aa22a2675e7e4d8c7e78a6a19b8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of a callback lure heuristic suggests a potential for social engineering to trick users into further interaction. While no scripts were directly extracted, the PDF structure and heuristics strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/5049547852.pdf In PDF document text
    • http://cloverdiamond.com/file/xesojebu.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/zesufumewelitone.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/16306519986kts.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/66938725890.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613077711f7d2---loxeve.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/20451078514.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca60b38bf---57722759688.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/gigotokakukividezu.pdfIn PDF document text
    • http://vhz.cz/user-files/zatedimegi.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/44875289931.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/11965538802.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/30242665478.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be087b924a---renuzot.pdfPDF link annotation
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/74767951223.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/dufosidatulatazazebesu.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/89663428045.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/58635560694.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/jiguvamogodujejidi.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/goxajetumulamoneluwa.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/24771189816.pdfIn PDF document text
    • http://benrassam.com/uploads/files/labobugaj.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/71307181339.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/11509297700.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/xolazazejiniwasovof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=retrieving+deleted+contacts+androidPDF 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_off0000bbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 16432 bytes
SHA-256: 8a2bad473535b2bb8849c172a21730bc3f32ac82a8246552a6acc37c9c26a26f
font_02_sfnt_off0000fdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB4 10656 bytes
SHA-256: 1e949d6be675dbceab2bc1faf82dd67ea5ea2147ff925d67027af37844859516

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