Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb001c3a59fc3db…

MALICIOUS

PDF

65.6 KB Created: 2020-11-28 01:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 62d7535ea1449edaf6454ddbdedce9f6 SHA-1: 11ecb6498419e4bbc74a86057b2f0f17eb7c8723 SHA-256: 5eb001c3a59fc3db048b8db99b9d80651728f32fda708fb25019c232e853dbd3
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-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://traffset.ru/aws?utm_term=calendario+2018+pdf+colombia PDF link annotation
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/5124095.pdfIn PDF document text
    • https://zikenanevo.weebly.com/uploads/1/3/4/5/134589255/5871728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5faaaf8a4360d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_5fb91b64c80e1.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/6379409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f8cb25829ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_5fa1fd30157c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/adb_driver_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/approach-avoidance_conflict_in_relationships.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/anniversary_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/pdf_hatha_yoga_pradipika.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/35231194737.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/bdo_sorc_gear_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/enfermagem_clculo_e_administrao_de_medicamentos.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/acoustic_research_subwoofer_service_manual.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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 5688 bytes
SHA-256: 0225e446da250ff286439ed58ff4e05d977642ade18eb22e732318b4e964ae83
font_01_sfnt_off0000d264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD264 11996 bytes
SHA-256: 82454c4ac2c8a90a9f7b86373f683eed21973d61894e33d0e3d848db875c492d

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