Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed92a7bbd2fdd98…

MALICIOUS

PDF

77.0 KB Created: 2021-02-16 18:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dcd0d5ba6736101c831b9c5bcd850e7b SHA-1: 60ccfede16edb094558b6011e4f7bdb6db028292 SHA-256: 5ed92a7bbd2fdd98825d4c97b5855eb5eb543cb0cc1256d40e245040054b8f7c
186 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 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=ps4+slim+eject+disk PDF link annotation
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/kuwavibinorog_kulilofa_fisina.pdfIn PDF document text
    • http://fudasoba.iblogger.org/mufurivirinip.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/jg4Ghhg/7686415789.pdfIn PDF document text
    • https://vipomumukewa.weebly.com/uploads/1/3/0/8/130813786/383afc7675.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/Z5jcvr0/misugetekeregapegexupexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_601f0ccbc9b81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fc7ce3b83959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_60208cea38695.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/ha4jhE9/ice_scream_3_horror_neighborhood_download.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/vinipe.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/ihqigXo/36644218858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5fe112bd23fb7.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/gm6kbBV/ultra_hd_4k_wallpapers_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/2hgjafM/fishing_clash_codes_july_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/icjhjcX/xidiroxelavat.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/jaIjfii/29668119562.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/269c7f18f3.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/af9bf253.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
    • http://galiwasik.rf.gd/nimiwonolule.pdfIn PDF document text
    • http://vafikozokus.rf.gd/kirodajelezev.pdfIn PDF document text
    • http://gizejofak.epizy.com/que_es_la_anemia_ferropenica.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_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 4580 bytes
SHA-256: a1577797c8adbdb67a5302ca22810abe450e0e0c294abf06c140f638e6e19f37
font_01_sfnt_off0000f526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF526 10400 bytes
SHA-256: 1c9df4baf0e75a71590b90d2e45441768ba401d25262f976a575235ae4038e60
font_02_sfnt_off000118d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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