Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5178d234e82fbd…

MALICIOUS

PDF

77.4 KB Created: 2020-11-23 13:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e345c37621e1b284e809992620884cf7 SHA-1: a8f3732c13afa14b84653d400623ba8eb89002a3 SHA-256: 7b5178d234e82fbdde638c37602a10cf45ff405107d473f2c281b312df0825cd
196 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. It uses a password-protected-archive lure. 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 0.9997

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafftec.ru/strik?utm_term=el+croquis+pdf+descargar+gratis PDF link annotation
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/kalubegimexu_kivojuxutoj_woletefakos_xisomumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f92f5f4bf677.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/7307287.pdfIn PDF document text
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/badopezomotusov.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/114da6836.pdfIn PDF document text
    • https://xovadesunuzavam.weebly.com/uploads/1/3/4/4/134479636/pedirugasuza_filobipedu_wabafamak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4a3719e7-deff-44ff-92ca-fd2354bc9404/navarro_college_waxahachie_tx_transcripts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f89bc0-59f1-4814-a955-75d74a41316a/yoshi_garden_earrape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed39929f-a3e3-42cc-9ec4-297b9d9a9a73/wristech_jb5538_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb86e269-f5eb-4eef-9272-8bfccb9f4730/xusakuvitajeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c05e84-cc79-4500-b4a2-16b3da2436f0/23793674492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b752b6-eec8-433f-924e-a14a09bdcdb9/the_holy_spirit_guide_you_into_all_truth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6326619-d74d-44dc-8a17-2ce98e181e28/st_ansgar_school_calendar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612f2107-c320-4dcc-a99a-7e71bceabe3a/embalaje_definicion_segun_autores.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 5184 bytes
SHA-256: 18d7fea9e46d7e147df127e774fc1f3a1269b2d1dc523ac5330aafde555cd181
font_01_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 12320 bytes
SHA-256: 3d0c32703f9592bc51fd5b113ee48840c993114a698db217bae194768684bf7a
font_02_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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