Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecfe79e7a7f18cb…

MALICIOUS

PDF

77.9 KB Created: 2021-04-05 00:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a72068507f63d19c4881e866d8af3f SHA-1: ad7208b5a5975999ab477f8090b2e5c5b7277acd SHA-256: 2ecfe79e7a7f18cb519f4e6a4952350c96787ada0a474967e81112c3a964a38f
196 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, a common tactic for link farms and phishing. Heuristics indicate it's an advance-fee scam lure, suggesting the user is prompted to interact with a link to claim a prize or resolve a financial issue. The presence of embedded JavaScript, though not directly analyzed for malicious intent, is often used in PDFs to facilitate malicious actions like redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/123?utm_term=derogatory+marks+on+credit+report
    • http://sushibara.net/35291194684i0752.pdf
    • http://afracheat8.xyz/31769688100xz3bz.pdf
    • http://mbfsopg.com/vazimodomupopajagoz767hh.pdf
    • http://vorecan.fun/fagilibiwovikoj1u9n.pdf
    • http://pro-konditer.com/physics_equation_sheet_a_level_ocr6t387.pdf
    • http://nenegifivujaxu.mypressonline.com/maman.pdf
    • http://nurigoluda.mygamesonline.org/jevevapi.pdf
    • http://felesatediz.medianewsonline.com/history_of_the_world_part_2_imdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7da6fcc8-b5b3-4164-ad94-61dc8513225f/iso_27001_certification_process.pdf
    • https://uploads.strikinglycdn.com/files/39bf1a79-b84c-47be-b287-06481bb10d63/importance_of_college_education_articles.pdf
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_84dedb54da7c429f9c6a572365859222.pdf?index=true
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_e3fb0e424cc0468088bb06f987d4ae9d.pdf?index=true
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_c4c78be6a7ec40e5ae4bd69f9601dd59.pdf?index=true
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_289cd4881e4a4f3fb37c3a0fb4082812.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a8b64d6d-2407-4ca1-ae5c-720ab93af1cf/35850665362.pdf
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_f7633c9f68144ed4ba657d43c98961a2.pdf?index=true
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_2de529f65d504b95b838df1adfb4b3ca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5300086a-83a1-4da7-aff6-ddfc37ea6897/46484249506.pdf
    • https://uploads.strikinglycdn.com/files/0b5aeb88-491e-4305-a3b0-acece2916f6e/who_makes_honeywell_cameras.pdf
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_f2e75257827d4f849dcb376d9eaec4e5.pdf?index=true
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_3dc7195eef8b42dd802b723b1290a315.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef54.bin
399e8e36ef3dfb8df3caaa0142026a9a0d42d76a53a42d71c476b31f03bb557c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 5528 bytes
font_01_sfnt_off00010221.bin
81cb575a00c975b868c263a2ee5683e71d0641c010e7e7115aec744baf4bf807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 11252 bytes

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