Malicious PDF — malware analysis report

Static analysis result for SHA-256 70aa03a4d2db4d5b…

MALICIOUS

PDF

81.0 KB Created: 2021-10-15 11:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e498870ce04dae800586354f0e978ddf SHA-1: 75c9e0940242fa7d9ba26d0ba0381585fc2b32f8 SHA-256: 70aa03a4d2db4d5be5b1ef38c9b16973ed89126a82e3f415d6c4ad35424ad937
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://laborke.ru/uplcv?utm_term=the+coming+prince+anderson+pdf PDF link annotation
    • https://motiwalainstitutes.org/userfiles/file/lizoxovejeti.pdfIn PDF document text
    • http://dajia1.com/upfiles/editor/files/mefemujesav.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/32012932594.pdfIn PDF document text
    • https://htchninc.com/d/files/vazif.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/rarunosirelalumuxo.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/tedugukatel.pdfIn PDF document text
    • http://dasbluemchen.com/26163181061.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/97949413607.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/adae91tn2msohrgieaqn07k51s/29274511987.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/75311930520.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/42288848260.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-10-11/c79e9b0ab874b0b75e577e9cc06bb512.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/nematamofezop.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/najuzejevarajokabog.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/42162507812.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/460d6a54140f0cc2825964daf502ac34/47680876848.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202110050903456002.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/rawujesegogojitol.pdfIn PDF document text
    • http://www.toptehnik.si/images/4159860072.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/40031817359.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_off0000d728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD728 17856 bytes
SHA-256: 27faab3ecf249d504a73eb83db47772a9ec3230480e9fe99c6880e4bdfb66341
font_01_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 10884 bytes
SHA-256: 59c31f39f6aeb13b5a35d660e1ab6a21827e5458528464143392b4aca52ba5bb
font_02_sfnt_off00011f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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