Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b34fe95ff60e20…

MALICIOUS

PDF

72.0 KB Created: 2021-04-18 22:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1877a589b0e9366a0315cb28a6271f4b SHA-1: 88ea17c5acbd162b3c6f821fa50bc082e2e88908 SHA-256: 10b34fe95ff60e20222d530cb6e0f3e886c1d145d6486f8b89f285da6085fc58
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to disposable domains, many of which are designed to redirect users to potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The primary lure appears to be related to troubleshooting Comcast cable boxes, directing users to external URLs like https://seumenha.ru/strik. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to a malicious site for credential harvesting or further malware delivery.

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://seumenha.ru/strik?utm_term=why+is+comcast+cable+box+not+working PDF link annotation
    • http://torixobo.mypressonline.com/8274636761.pdfIn PDF document text
    • http://gladkoe-telo.xyz/617545683313udv5.pdfIn PDF document text
    • http://fofitev.22web.org/encyclopedia_brown_3.pdfIn PDF document text
    • http://paganel.world/287143167533zjku.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/vajoraxumagijegebotir.pdfIn PDF document text
    • http://onesmall.space/93046112465057so.pdfIn PDF document text
    • http://white-x.fun/wufufivjtf4x.pdfIn PDF document text
    • http://rasprodavaika.ru/madalakejatalor774zh.pdfIn PDF document text
    • http://avto-trokot.xyz/que_es_dibujo_arquitectonico9hsz0.pdfIn PDF document text
    • http://myyshooop227.site/what_are_news_values_and_why_are_they_importantajfqq.pdfIn PDF document text
    • http://moshon.space/vederawuvfzz.pdfIn PDF document text
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/bojekumuvivi.pdfIn PDF document text
    • http://tazanup.mypressonline.com/great_man_theory_of_history.pdfIn PDF document text
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/6898572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizibabazuvuxu.rf.gd/63078788783.pdfIn PDF document text
    • http://jilawovo.epizy.com/is_there_a_food_processor_attachment_for_the_vitamix.pdfIn PDF document text
    • http://sogefotasir.epizy.com/savarupebisemalojoluriz.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5692 bytes
SHA-256: 76743f2c1d3a027402bc23bcb384b16c562939585f2d512c38a085a0424f47b7
font_01_sfnt_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 10188 bytes
SHA-256: d116eb6b19dd0cd1d636683b5cd5902be253325c2304ffb4ccb73fe40d75d811

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