Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8f07592829c712…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 08:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f866f1b9c47383c45fb679f21f4d21c6 SHA-1: b0157a7e413ab0a4ba4e1555be9adf648d29b164 SHA-256: 2f8f07592829c7125da981feeadb539e1349ec06e604cf2312b11ca25a3e5e3d
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-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/strik?utm_term=infiniti+pro+conair+blow+dryer+1875+reviews PDF link annotation
    • 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/c2d351ca-bad3-4113-8779-48e70d225c24/zabatokus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bb5194-1138-4ff4-b38c-c7dbfbdd074c/crpc_bare_act_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918cb57a-dcf2-473c-b50f-3c174347826f/totod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f654fe89-bd91-4da2-92c0-f20b3df48e76/58800027662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb466b4-8bbf-4f64-b9f2-5e2f804c25ab/setonobakulukozudujuxapol.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_27b310f05a7b4784b8655c1d5089f7d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1afee6-faf2-44b7-b443-8da57ca5033d/26112992863.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_e2ce99f14a414e11b403d571f7877961.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_bde3df8a79a94dfab1beef2e2e15d190.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5e1436-b119-42f9-90f1-578cddb5bde0/parrot_ck3100_not_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ebf914a-45b7-4993-9ffd-0a1dd1ee181e/6468917485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dd8b74-a440-4fce-a62c-bf657bb1133a/silimidupepepagegugoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3c47fd-7f85-4de4-9cc4-c52d250b99a7/27588384601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2dc1d4-4e4c-4823-a5f4-4cff25d4aa8b/mr_coffee_12_cup_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/622adfc3-b637-428a-af03-32aedb063f40/sat_prep_programs_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06da6fbb-404d-416d-a6ff-7cb88fed2e0d/39329055984.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_2ea523b077a64542b9580c70e13fd963.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_f1a3529e49404a348479e8db95ad29a8.pdf?index=trueIn 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_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 5720 bytes
SHA-256: e77a062824facc812f2b1c02c9380fecc807e1e8fbf5b4e51e0a3f34d707d17a
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 11116 bytes
SHA-256: bf2382dfe8615da8deaf06ce9321d9e1c9d4279e640722767b062e8e39cffbb7
font_02_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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