Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1dcd4f19d48519…

MALICIOUS

PDF

69.3 KB Created: 2020-11-29 17:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e69b3977f6525f94b9fa4df8adf5278f SHA-1: 2a5b6374cc0c85afc5db0df920f43959bb5e67dd SHA-256: 7f1dcd4f19d48519fb6e2a24b352566141c8eb5b7b9929dfb60669ba0e6da437
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://traffset.ru/123?utm_term=armed+with+wings+series PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f88c5341d26f.pdfIn PDF document text
    • https://dolakavurig.weebly.com/uploads/1/3/4/6/134647128/wegol.pdfIn PDF document text
    • https://manajizi.weebly.com/uploads/1/3/4/9/134902852/sobasedifani-fabogarived-nivevazadasiv-fosumumite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f8f04cd68d56.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/3879d2e6-a7b6-4277-a1cf-ca5049125922/how_to_hack_whatsapp_using_whazzak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb6cece-fd2b-4dd5-ade1-8b4d7c0c73ca/critical_ops_hack_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4357ee8c-f0b9-4d69-97b5-40ee545d3a79/velocity-time_graph_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a163d2-6939-4f61-bc7b-dea36abc690b/kolumawapiligevuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f348bf6e-f945-46fc-a12c-389f81633ee6/miami_dade_clerk_of_courts_recording_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a587d2c1-9153-47bf-85a5-e5f41dc71804/bonobatadeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d565cef-5999-47cf-8e00-3aec09204449/safeziwexifonuzug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8e7fc3-62ec-445e-9c31-c8c866a5efde/zaxazesaxenetulimanezoze.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/79765048215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1874cddc-3de3-46cb-8e37-d3538b31ffd4/zuloriledaveluwuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/13050487897.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
    • 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_off0000bec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC6 5076 bytes
SHA-256: 92a7d27838d01e6c82b61c87331203c9c1ed6b107be9d4fc3fcd0ec113a42eaa
font_01_sfnt_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 10264 bytes
SHA-256: ed2deb96ff7aa5d0f9389b43bc04d840734d1c63ec3ac3133856c3fa2214bb47
font_02_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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