Malicious PDF — malware analysis report

Static analysis result for SHA-256 602932b16348d89c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-15 22:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e5146f74d81e8827d933eb8d2cb4d53d SHA-1: 69f96b2a2023c60a3fe9490c110410f58152cb1c SHA-256: 602932b16348d89ce022428061c6378af9b59a2d3e27aa8a307ed8fc03e34549
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs, including one pointing to 'crewmak.ru', suggesting it's part of a link farm designed to redirect users. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=lucy+y+el+monstruo+pdf PDF link annotation
    • http://adhdesign.de/userContent/files/20210902143105-xupaf.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/wifexovalep.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/belojut.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/jisumosewe.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/70655189737.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/98654868078.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/kutivenadagepumutukodix.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/sibexaso.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/30495323525.pdfIn PDF document text
    • https://pr-dienst.ch/file/35098856872.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327e6a195ce---zojiginepuxapivunukofoti.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b73af31aa8---75548635425.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/lutetubanatof.pdfIn PDF document text
    • http://aven.su/userfiles/file/fokejokizutagikuruf.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/5901874772.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/galewenibok.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/43903501403.pdfIn PDF document text
    • https://rotitelor.com/contents/files/batakoxobowiwilegeminoj.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/46750490849.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/libujoloja.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/80196541467.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/jowomeba.pdfIn PDF document text
    • http://nova-auto.com/upload/6363874617.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/84211262512.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_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 19532 bytes
SHA-256: 6195ed2dfdb9069602fcedae674d69b71a992ac7da7331fa21c02bdd88e8a9e9
font_01_sfnt_off00011232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 10696 bytes
SHA-256: 7d7ae9b24e70cbfd6cd85f1f780b90423bda7a5f974c3e5cef2ea165ae527748
font_02_sfnt_off00012acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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