Malicious PDF — malware analysis report

Static analysis result for SHA-256 000c28f8f1a03d5f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 04:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 908f4de7f59c74efb767ecbaf3fb5036 SHA-1: 52a24b35d0c4b116f292a0d9fc1d2f47d1a3177d SHA-256: 000c28f8f1a03d5f3862ff525a5a5de8bcdb97256b3b1f9d88cacc0cf377b29d
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. The PDF contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the overall detection profile strongly suggest it's designed to lead users to malicious content or downloads.

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://senesi-sklad.cz/userfiles/file/54184732477.pdf In PDF document text
    • http://come2menorca.com/images/file/ladezedetikuguvilol.pdfIn PDF document text
    • https://dabanbep.tanglehadong.com/upload/files/62694019786.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/nipibekawofunuvelalaloga.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/83139101166.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/41445571648.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/narujesanoxaraz.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/18486284148.pdfIn PDF document text
    • http://tencanpowder.com/d/files/naxazoxogukafifozaro.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c60b2d9c43c697c9ed7078b5eb2d69ce/57040016722.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/segurinerujufewojuwafefi.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/zevasokaxi.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/kogijosafanepebow.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/71577637605.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/35336138845.pdfIn PDF document text
    • http://acelybio.com/upload/files/zibutuf.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/xogixilerewetujagabamasof.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/56612470675.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210905042507.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///52456542381.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/10040817932.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/709irkpv2qh9m0u64spfc0jpf6/ranelutuzag.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/87380991903.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/74483300638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pes+club+manager+downloadPDF 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_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 10848 bytes
SHA-256: 39b9cb5c7e6768f0844358ffeede50500ab3b1d898be7f4557449b1d5607f570
font_02_sfnt_off00011088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 20260 bytes
SHA-256: 5c763dfa1dd5a4de00da2e802bb4179f73f35a8754d1e9c9bcfe48588122be89