Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa920aca71e53dbf…

MALICIOUS

PDF

70.3 KB Created: 2021-03-28 04:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bd660339edf1ee53d8f47beac8a5b715 SHA-1: 86361096dc069cd6aa650039d59b85f77f741f91 SHA-256: aa920aca71e53dbf8a4ab658048d2cb424c5119a16372a6add635951da01d097
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://nipisod.ru/strik?utm_term=2005+dodge+ram+1500+5.7+hemi+turbo+kit PDF link annotation
    • http://rixorevu.getenjoyment.net/cordell_designing_audio_power_amplifiers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_60267ae741c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5fd3cddb71d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fd7b30235c49.pdfIn PDF document text
    • http://nikubet.iblogger.org/9368374981.pdfIn PDF document text
    • http://logusubunovad.22web.org/26013131048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_6046804dbbf03.pdfIn PDF document text
    • http://fatadakar.iblogger.org/wowuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_605501400d96b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_605bfdb44d1d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d686.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d686.bin)
    • https://uploads.strikinglycdn.com/files/0099a1e0-612e-498c-8229-aba05110c76b/45206870574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42878ba-826f-4105-ac44-a9b7aa3eaa9e/what_is_the_price_of_generac_generators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047c8bf6-1f69-4a23-b123-3342bd151d4c/how_do_you_clean_panini_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10424947-4af3-4c48-87d2-dcff6b939874/what_are_colleges_looking_for_in_the_college_application.pdfIn PDF document text
    • http://dijuforuzukogem.rf.gd/astrophysics_for_in_a_hurry.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/cierre_precoz_fontanela_anterior.pdfIn PDF document text
    • http://mowedesidafog.epizy.com/govetebozabopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926f3509-d852-4cf9-894e-8c471a4d9254/xusikujasamuli.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://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000d686.bin)

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD686 5700 bytes
SHA-256: 143f6f8d4fffa8a6b9831c6b93d7ea2ce26c593d990bc8190b752797ae77a10e
font_01_sfnt_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 10044 bytes
SHA-256: 524063b431b322bed0da896581d49305acb54edfc500ab6be1cc84ce7fe4cd73

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