Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f09f26cadbd519…

MALICIOUS

PDF

67.2 KB Created: 2021-02-21 04:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 78ddf19a148d3c0df859dc98d4fce3d6 SHA-1: 9e88f4166fac00e09dea2c752389c858e1e7f007 SHA-256: a2f09f26cadbd519dcf2bcdde4638ca316c1fc830eb1d78026bb7e48bb7e15d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=managing+my+emotions+wheel+pdf PDF link annotation
    • http://kpovli.ru/kumusugexabopenetilopb7nwl.pdfIn PDF document text
    • http://wibetunutivemi.iblogger.org/21960940388.pdfIn PDF document text
    • http://7gusevshop.website/laney_supergroup_schematicde626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fdf09e7a07c8.pdfIn PDF document text
    • http://legko.travel/blouse_cutting_method_in_telugu_freex93kl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_601cea7d82f3d.pdfIn PDF document text
    • http://letgtma.bid/chutti_tv_title_songbo17b.pdfIn PDF document text
    • http://ragadugizidej.22web.org/cgegis_table_june_2019.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/anemia_de_fanconi_diagnostico.pdfIn PDF document text
    • http://remont-kholodilnikov.website/ammyy_admin_3._5_for_android_mobilei9gu0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fd084673dd8e.pdfIn PDF document text
    • http://pobigajik.22web.org/gatofara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_6022083f34384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 5556 bytes
SHA-256: 30543a253860c1a93c8d1ae80b12613f21fd391d1aaa79f35ba1716027ebeeff
font_01_sfnt_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 11004 bytes
SHA-256: 80849333cfbb1a84a18c71a74f3bc58873d9aa4fcd5bfd0d7dd5d1a1aa52740e

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