Malicious PDF — malware analysis report

Static analysis result for SHA-256 744b8055daf67aef…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 01:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e78fb1ad1cf1b9edfa8ad8038f3c3c1b SHA-1: ccfc7b123900071878ae4a41d55a5b491e15fce1 SHA-256: 744b8055daf67aefc3bd6e72dc06010fc6f2c7b27fe41739da00262d8c7cf6a7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the link farm behavior strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://maypoin.ru/123?utm_term=birthday+party+invite+templates+word PDF link annotation
    • http://milanbeach.fun/24953453401aj3qz.pdfIn PDF document text
    • http://debodopox.iblogger.org/design_patterns_explained_github.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5fd935b7a0f35.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/retencion_placentaria_en_vacas.pdfIn PDF document text
    • http://triple-doska6.club/how_to_use_a_cen_tech_digital_multimeter_61593q2rjn.pdfIn PDF document text
    • http://tortomsk.ru/26662690821osjvi.pdfIn PDF document text
    • http://zumufufup.sportsontheweb.net/91267846686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_6012a2f2dc2c2.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxaxebowe/btthjic/assassin_s_creed_apk_for_pc.pdfIn PDF document text
    • http://jesipuvapuse.iblogger.org/12717396031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_6041ef3d31603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_60363635b5228.pdfIn PDF document text
    • http://cparta.moscow/defensive_driving_course_test_answers_texaszf2uo.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/bO7hh73/classic_fm_radio_app_apk.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/all_algebra_1_formulas.pdfIn PDF document text
    • http://salonvarna.com/vekatisipujanugivogab383zc.pdfIn PDF document text
    • http://montana-media.com/pefosezenuluwodaraau52.pdfIn PDF document text
    • http://nosinoski.shop/63760137125ath3r.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/xjhrD4A/boomerang_maker_boomerang_video_maker_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/KhdhecI/86524226790.pdfIn PDF document text
    • http://shoop-fo.ru/zurigutunogesupigivikyo1fe.pdfIn PDF document text
    • http://mebelintera.ru/motizoxonekojezinet0rsdn.pdfIn PDF document text
    • http://aarbuz.space/83268864216zazcv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzegez.epizy.com/zexiretovakezurubava.pdfIn PDF document text
    • http://joberemig.atwebpages.com/custom_animation_powerpoint_2020.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/capites_da_areia_resumo.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_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 5500 bytes
SHA-256: 9e57e5c890370bea09fea6f5573ef0975da1158c0c98f81c941e7364522360b6
font_01_sfnt_off000109a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A9 10560 bytes
SHA-256: 699fa8cef8259c8098e3a7a648a91554b07347ddced93eb9e59bbef06caac85b

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