Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee424536b01eac0e…

MALICIOUS

PDF

79.4 KB Created: 2021-05-29 21:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6bf34d37104f6c89ea2268f08830226a SHA-1: ec2d4c86624f2a2545f5ee286b8871f23014ee04 SHA-256: ee424536b01eac0e25c072f8bca2e6de11fceb50b495af2a75346f264d65865a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The PDF contains a large number of external links, suggesting a link farm or redirection strategy to host malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external URLs points to an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/123?utm_term=balanza+de+laboratorio+pdf PDF link annotation
    • https://xonidaxu.weebly.com/uploads/1/3/4/3/134319292/7024965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_601fa1f5aeac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_604510e772fd8.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417025/normal_60b0cd7f7a2e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_60446bb1cfad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_600d243240fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_605cdba7c98b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5fd8fddc2d34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_60291f7577777.pdfIn PDF document text
    • https://nudimulax.weebly.com/uploads/1/3/6/0/136010194/fudobafapi_xivutefowimoxef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_6069e7c275359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_6013b4a29eab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_601e40f266a3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5ff04609a2d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5fdc196751e40.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/3fb95a20-79b6-45bd-82f7-422337ea9408/how_to_get_unlimited_cash_in_township_without_human_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707994d4-9ca2-4aee-b4c0-879ecef891e9/98391956239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e88dfd9-2158-4cc0-ad17-d07ee223340b/how_to_clean_a_craftsman_shop_vac_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccc1f8c-8b5f-4fcc-a6f9-298227249922/where_can_i_learn_how_to_do_eyelash_extensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534c4726-4439-4810-86ed-7f07906e3e79/77008834324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da6b119-d743-462f-87ae-24a2bf84b34c/28253943443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6adbd2d-2289-452a-a715-594d58584688/98475221617.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_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 5096 bytes
SHA-256: a64e4e662cdd95b1b50dc816bb1a70cc76a064d05ddb14a66784ff79c2b95319
font_01_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 11824 bytes
SHA-256: 7856d434a63ce90dcf97c808cb4999d3614a7145b083d7ab9ea0c0bf16acbbcc

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