Malicious PDF — malware analysis report

Static analysis result for SHA-256 c656ccf290658c22…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 10:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c909321fe5d53699618a2ad852958fa4 SHA-1: bd87d0a3dc88d33a99c232f58c18c8d845e965c5 SHA-256: c656ccf290658c228ebf2929a3cf9bbdc93d4d1393ae7f0a977e3b8d1bd95148
126 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 document contains numerous embedded URLs pointing to a link farm, suggesting an attempt to manipulate search engine results or host further malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious campaign.

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://emtracing.net/userfiles/file/xujavomomoxe.pdf In PDF document text
    • http://tech-in.info/bramy/userfiles/file/wakubu.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/26320033183.pdfIn PDF document text
    • http://pmke.cz/pictures/files/fafogasuteruviziniwivo.pdfIn PDF document text
    • http://villkasz.hu/editor_up/jolusenasewigunamifeku.pdfIn PDF document text
    • http://chinalabware.ru/d/files/15523362932.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/65687876388.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/pawuvafegixi.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/fimobifogeberivokemi.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/61935402147.pdfIn PDF document text
    • http://minhanh.com/files/watowarubujuxuru.pdfIn PDF document text
    • http://annabarons.lv/files/files/wapevidumef.pdfIn PDF document text
    • https://marlschuz.com/userfiles/files/rakixuxisijesoner.pdfIn PDF document text
    • http://hotechike.com/files/files/76294467730.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/68495098702.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/16172326594.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16134a2b2ba011---suroveb.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/tajojavus.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/goxumexarukasodirezuxur.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/pabonekawu.pdfIn PDF document text
    • https://masihpt2.com/contents/files/migexotufa.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/76950311221.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/biziwanimijuvoxozebed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=marimba+ringtone+makerPDF 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_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE99 18064 bytes
SHA-256: 10e4b76d0c6b595a0df094a407beaeb3b97ed7d0eaef5717381074ec6935e44b
font_02_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 10464 bytes
SHA-256: 2032b96995d317238687fa77347679ac1ddd6bb831d40dbd581dea844a910a19

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