Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c5d8af15fc3c72…

MALICIOUS

PDF

75.1 KB Created: 2021-03-09 14:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 7e8306dd11d09271e228d40305049603 SHA-1: eec96f37f7b1b14ffeb74a9a9bc35dcd676eaaac SHA-256: c0c5d8af15fc3c721e7988cfa08aa548b59d0862c55c5ac9b7a4c4265493ec1a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=parallelogram+proofs+worksheet+answers PDF link annotation
    • http://wizapivizesib.mygamesonline.org/what_do_you_do_when_your_washer_doesnt_drain.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_did_thomas_merton_die.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/dPhjghy/wanofijofoweguxag.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/52172502880.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/iahbJgv/90975343862.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/93654214495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a353d29f-adac-4b3f-9a64-d6d1c245d726/najozaduromojuxomag.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/vokuxupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfb3f17-85c4-4b9a-8fab-77eb17d0a5e7/tudalikatepugutajovu.pdfIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_ef37da6ed9224794a2f7c064c04cc1e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4996c698-cc15-4052-9278-d3d30d7f3b8f/bazonujerepisozunul.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_66dfa99558174776a445e207ad5388a1.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_a4e5ef9945f2484b9cf5f8e8049a4cba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91964526-cc5a-496c-a437-06f8b5ce3ed6/dish_network_wally_dvr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f50db80-752d-4872-84c6-c3e9532b8aa7/metatex.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_off0000e54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 5472 bytes
SHA-256: fbeacde5d057c500f6e858f947038d83d3f4f099307d7d44bb4f6669508b69ea
font_01_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 12340 bytes
SHA-256: c142c1a0f26389059d161240ffaed8be618cb1c3ff8249d60c5cf173013a5f1e

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