Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f9b2c6bf55b1ff…

MALICIOUS

PDF

75.9 KB Created: 2021-05-04 00:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 25d589741d3554c8f375b9a17dd9263f SHA-1: 2ca305e31e60ae865889135418673c02553a96d0 SHA-256: 19f9b2c6bf55b1ff9e6ed241dfa9c4fa8ac78a1e55690e85632e4e218d54c191
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to job searches, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=health+and+safety+jobs+australia+salary PDF link annotation
    • https://cdn.sqhk.co/kolusugego/vgehFoc/dead_eyes_lyrics_in_flames.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/l6hdgik/dental_office_assistant_job_description.pdfIn PDF document text
    • http://purejup.iblogger.org/arya_2_film_video_songs.pdfIn PDF document text
    • http://watogoda.mypressonline.com/adapalene_gel.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/Rhi4hjg/wikonezexadijewomuzo.pdfIn PDF document text
    • http://rentline.pro/manualidades_para_bienvenida_de_bebe5evfv.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/jbHhbhc/jetitonuzagexemol.pdfIn PDF document text
    • http://italiahot.fun/7657794238qcj8a.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/jfSjciH/dazezatawud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firiwigisu.atwebpages.com/couper_un_adobe_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d8efcb-d8e5-41b9-bdcb-9a6b503503a0/julepezisexukito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7f5558-c6a4-4ce2-9a33-d682e35b23d0/organizational_behavior_18th_edition_by_stephen_p._robbins_and_timothy_a._judge.pdfIn PDF document text
    • http://poxemibusap.epizy.com/balistica_tecnica_y_forense_octavio_cibrian_vidrio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5428cfd-23d2-4907-aadd-c53dcfe5bd46/farofozepafekufiboze.pdfIn PDF document text
    • http://rasijubesu.epizy.com/medicinal_chemistry_graduate_programs.pdfIn PDF document text
    • http://xotopusedewix.myartsonline.com/xililotezapefok.pdfIn PDF document text
    • http://navotemu.epizy.com/fujexepad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5262ed-a9e4-42fd-80b3-a0f1dc03b285/how_to_tune_cobra_29_ltd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cff199-5ec8-47d3-b563-4f374349b25f/30461525710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fedd52-4cc5-464a-912b-a8da1db4d1e0/musalamesidapogagogozofo.pdfIn PDF document text
    • http://mazizinopuki.rf.gd/applebee_s_carside_to_go_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a17ef4d-a78a-48a8-8982-9ddae041f400/14104076178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707573bb-0a89-4d61-af79-35f75df7c74f/kingdom_manga_640_release_date.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_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 5276 bytes
SHA-256: 1725ff35cb99ea0a5ce62c357e22ae76b00a5360c28f166e7af0512ff94a08d7
font_01_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 11100 bytes
SHA-256: e32d8f6cf6b37b5244f332f0518521e62c0b40c97e7db3248ece27b398ce13a4

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