Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a78148276ebf06f…

MALICIOUS

PDF

71.3 KB Created: 2021-02-28 20:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8279a7f8c1975e1220a85bcdac89bf29 SHA-1: d4ee685a1110e18dc07a253c1d239d4db92f29d6 SHA-256: 2a78148276ebf06fd77ea906ba047fc7f6b19ba356c1355351eb1c5fd4fcf6a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://dugedepap.ru/wix?keyword=guided+reading+workbook+modern+world+history+answers PDF link annotation
    • https://cdn.sqhk.co/lokalofobox/Mgihjhd/stadia_cyberpunk_2077_release_date.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/hot_gospel_songs_free.pdfIn PDF document text
    • https://lidukawovov.weebly.com/uploads/1/3/5/3/135323160/luneperetune.pdfIn PDF document text
    • http://wozoxudo.iblogger.org/simaxakipalaxegifivisenib.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/kidemagaxopan_zomal_vekesiwixiv_rurisiluxobe.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/jchijgP/download_offroad_bike_racing_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_600c210a0f7e7.pdfIn PDF document text
    • https://dulipitigisol.weebly.com/uploads/1/3/4/7/134717891/xikujos.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/c1gcKEu/baby_shower_phone_games_pinterest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ff7cc8f0ca40.pdfIn PDF document text
    • https://cdn.sqhk.co/teduwugevoki/0jgZlyc/vubidebasutimixogi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5ff0ab1a8dc0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_6020c51b2113f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/how_to_adjust_valves_on_briggs_and_stratton_intek.pdfIn PDF document text
    • http://momosetid.rf.gd/turbocad_mac_user_manual.pdfIn PDF document text
    • http://bozudob.epizy.com/rimojoxoxonosaxav.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/el_anarquismo_en_el_ecuador.pdfIn PDF document text
    • http://pukewideje.epizy.com/zufeparadus.pdfIn PDF document text
    • http://pekijokedod.rf.gd/beautiful_disaster_jamie_mcguire_online_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/12869740669.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/how_to_calculate_book_value_of_plant_assets.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_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 5668 bytes
SHA-256: e3d2d38c75a6952cc7cd7852e1ef94d75f7be5d7087b8034eb53175f7ffd68bc
font_01_sfnt_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 10060 bytes
SHA-256: 27a377d05cf4456a1b6feb0a2a660552226a7e0ee24302a3d71a114ad4a6c19e

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