Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd5d740ac75434f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 19:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7dd2e3375604110d11fcd2aacd4b8bf3 SHA-1: b6102f58dca4b63cf372ea90517311f69a8058f6 SHA-256: 5bd5d740ac75434fd20273868617c51c0dbdd45b8015a0e2af6f5ecac5a094cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://wastran.ru/uplcv?utm_term=full+romantic+movies+list+hollywood PDF link annotation
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/23918786748.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/46003404567.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/luripuxaxo.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/gegekotabujadipixize.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/wotugefad.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/kiwavu.pdfIn PDF document text
    • http://flexa.cz/docs/file/50895858407.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/53316903224.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/69069255138.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-11/images/files/robewabi.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/wikitepelu.pdfIn PDF document text
    • http://zamgph.com/uploads/file/080118257439.pdfIn PDF document text
    • http://trinitysportsandleisure.ie/userfiles/file/madezefitimolirosu.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/bazosowuzenukes.pdfIn PDF document text
    • http://blueyee.com/upload/file/070256327577.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/womelirulemamewa.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/tevotoromam.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/wulese.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/32641543384.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/27262045738.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/boxawefutexuxibokuxofu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136a14493596---97134887364.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/92581912747.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_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 10980 bytes
SHA-256: a6a051830dfa5af81d93b4e206250349cc34279c879b78fc3d6a01ecebd07051
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 17356 bytes
SHA-256: 8d96fbb25b1187745a5f4c4a7a0fe231f9c833e47b8d9d442f5d04b8bc60f863
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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