Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c89a3d07e02a84f…

MALICIOUS

PDF

94.9 KB Created: 2021-01-01 02:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4ec6cc167059e04669f350afb54f4c34 SHA-1: 92c5b697d46959fd7c4d4454e158218d66de774b SHA-256: 5c89a3d07e02a84f5f1d8e42da88198a530007e999ac939b2633be2c4651a442
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 0.9995

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://traffine.ru/123?utm_term=cuento+historia+de+arroz+con+habichuelas+ana+lydia+vega PDF link annotation
    • https://cdn.sqhk.co/lerutefo/jgijf0x/contemporary_christian_music_worship_songs_free_piano_sheet.pdfIn PDF document text
    • https://dozisinabi.weebly.com/uploads/1/3/4/6/134646642/tixetodavowowukij.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/jE8giUT/pvpets_tank_battle_royale_mod_apk_download.pdfIn PDF document text
    • https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/3117174.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/ig5idQU/video_player_for_android_2._3_5.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/iogixhd/radio_k_poper_100_hits.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/c1515115-54b9-4244-aa53-063e3d2db58b/cyber_traps_for_educators.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/girexekojazudeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f741b0f6-973e-47bc-b12d-494eecb68b50/xakujanimezura.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_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 5456 bytes
SHA-256: 294c53ade384d34146b4ce6080b200521e72cd59f817d65e9c494c9092beae44
font_01_sfnt_off0001368a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368A 12180 bytes
SHA-256: 5084d00bf425eb7d5eebbdb8e51b11c4b601f2bc3ed526dd9718f57901100eab
font_02_sfnt_off00015e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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