Malicious PDF — malware analysis report

Static analysis result for SHA-256 9822a89cd357f78f…

MALICIOUS

PDF

114.3 KB Created: 2021-03-30 20:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3fff242c95addc8c49e0e5685dce0c33 SHA-1: eb3731fa50225a8b866612186b5365bd6834453d SHA-256: 9822a89cd357f78f15f96f620140b86cdf658732b030fdc091fff381345ad40f
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 0.9861

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://jacksth.ru/award?keyword=cours+complet+grammaire+fran%25C3%25A7aise+pdf PDF link annotation
    • http://begdas.space/how_can_i_search_images_by_size3bj23.pdfIn PDF document text
    • http://pomirkapa.site/lagu_123_wo_ai_ni_planetlaguhkw9u.pdfIn PDF document text
    • http://1green.space/moviesda_2019_hollywood_moviej5c5f.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/1a2b48a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5fc6cb980ad18.pdfIn PDF document text
    • https://foguzutaporoma.weebly.com/uploads/1/3/5/3/135322660/lupokerukeki_lorokevo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5fff2730d51cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_601711a0eefa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497095/normal_5fe3df739191e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_60512491249e4.pdfIn PDF document text
    • https://kigusokitog.weebly.com/uploads/1/3/5/3/135300221/8836005.pdfIn PDF document text
    • http://woodbonus.net/the_mortal_instruments_city_of_ashes_movietucb7.pdfIn PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/xorenirelivov.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/zigonexolozenevedamu.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://pumumiz.epizy.com/86772998031.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/android_oreo_update_for_galaxy_s7_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/94587788848.pdfIn PDF document text
    • http://zafuriket.rf.gd/25782458058.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/rilal.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/22403336478.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/divinunemebezinexebar.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/carding_machine_process.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/cummins_iceberg_model_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/71707179449.pdfIn PDF document text
    • http://ramufezumax.rf.gd/barrera_hematoplacentaria.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/university_of_chicago_campus_map.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/vaaste_lyrics_song_pagalworld_mp4.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_off00016dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC5 5564 bytes
SHA-256: 73ebb8399db1eb557b77c33fc1071427038af023055fd1c25a427d3f388a7c87
font_01_sfnt_off0001805a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1805A 13156 bytes
SHA-256: 78085bfb3558fe212cd3efb5459ea0342d0deb99c00c0785e884b7fa4d83c6f4
font_02_sfnt_off0001a9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9FA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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