Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ae347689055323…

MALICIOUS

PDF

69.3 KB Created: 2020-11-14 10:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 160d24840be44e7431532d5ea328f8b1 SHA-1: b356ef48c75e59b6f042541c7905a7ad16e42fd3 SHA-256: 39ae347689055323028c55e2063cf18598bc2955b7d006d6277af81377d8fee9
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 0.9997

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://traffking.ru/aws?utm_term=exponent+rules+and+scientific+notation+worksheet PDF link annotation
    • https://lorudopop.weebly.com/uploads/1/3/4/3/134315835/d5103502b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f91b098b7be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5fa6d1713818c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5faee2696d150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_5fa2289aeb7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5f96a576015d1.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/88cf6e75-3d93-43da-85d0-71b54bf21118/section_1.4_presenting_scientific_data_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a22fd78-6dc5-4aa5-8eb6-62453c62cbbe/nevermore_gw2_crafting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97c4e81-1184-4012-8741-6c5cc7671c7d/44891075762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0055a6-6148-4068-99fd-410cdd0dd21f/93526920690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a809c3b-751f-40b5-9078-f7488d30bd06/newososudoxata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d6a8095-b3d0-4e94-b7b0-d4e6845e6928/excel_veri_dorulama_otomatik_tamaml.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b6d2f0-0bce-4720-a52b-1d87abfcfe69/eagle_scout_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee242a8-c278-4b18-844a-2b5c610a01bf/plastic_texture_pack_minecraft_pe_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E7 5304 bytes
SHA-256: 560453ad74d85e4902a8820148dcc3fec6a04d9314b9ff37e2388c1171a619f2
font_01_sfnt_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 9880 bytes
SHA-256: 4696474277d1a72e281e6bf5869e3543206f2ac0565514382efef720314769de
font_02_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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