Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bd12e53027250f…

MALICIOUS

PDF

77.1 KB Created: 2021-04-03 04:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0bcb3da4e808eea18759a469fd056347 SHA-1: 5a77e3396509d366745afe648aa3b8343040f05d SHA-256: 14bd12e53027250ffea86946de531a5aeb7c9ed6eb8314cadb50257282e1bbd9
126 Risk Score

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 0.9960

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://dafemum.ru/strik?utm_term=how+to+cook+lasagna+in+microwave+convection+oven PDF link annotation
    • https://cdn.sqhk.co/tixunudixa/YjdggYN/97814023008.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/h2EghlK/62753410880.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/RO44ovn/ghost_guns_arkansas.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/5Bpgjgd/video_editor_app_like_tiktok.pdfIn PDF document text
    • http://mantenancie.com/wefakomutizutuxurewih2wkm.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/hs2Ydjh/milirorerokorekukuzaxe.pdfIn PDF document text
    • http://reduslim-shop.site/sql_server_management_studio_developer_edition11lh9.pdfIn PDF document text
    • http://safetymirrors.xyz/logitech_surround_sound_speakers_z506_5.142lsz.pdfIn PDF document text
    • http://intereriia.com/boardgamegeek_terraforming_marsa7xwb.pdfIn PDF document text
    • http://nudazemuxebabu.22web.org/korean_sayings_with_english_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/5Gif3ie/sirope_de_agave_es_sano.pdfIn PDF document text
    • http://clientesdkb.com/articulacion_del_codo_anatomiasrxo7.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/jpzHjfG/2778769610.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/powerpoint_free_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/jgdaidQ/child_care_aware_of_missouri_jobs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/121964b9-d112-4fc0-b63c-e40a6378af4e/5e_warlock_spell_list_wikidot.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/42566125203.pdfIn PDF document text
    • http://fuginifetulad.epizy.com/59139356677.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/87617822745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc57acc-aba2-4f94-b656-37aff8d62a6d/mejafimekuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4941700-2e92-461b-b59f-3a848c143667/tonudorufetagedit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e67b5f5-6ea2-4a15-ac39-f0d4777f256f/contemporary_human_geography_online_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/alone_movie_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/mikebovesizu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/kovefogaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c27f84-b858-4680-8377-3025b4e3c649/38229481577.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_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 5296 bytes
SHA-256: 517e04c43c100a744ac7d99af0a16837fb378c52e6d5c7a08283c8a8e2dd6cb2
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 11296 bytes
SHA-256: 5dc8a2c956de4d20cf620df1cc1ad3003eba83f9b7b7eeb0efd33353bd51d8e4