Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb2042825140d4f…

MALICIOUS

PDF

83.9 KB Created: 2021-03-19 08:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 26592b3a849b4bdb36b80db89becb8ba SHA-1: 2fcd8de12033810c11f96baa936d47991ce807cc SHA-256: ccb2042825140d4f750261693f04c8b6618b777868e51581bab4712bee7ca860
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=american+society+for+quality+india PDF link annotation
    • https://cdn.sqhk.co/xenivoronizu/gQtu2MJ/40516852196.pdfIn PDF document text
    • http://testertumentum.space/vibojitasugatilar6jokc.pdfIn PDF document text
    • http://bcipreactivaperu.com/robinair_34700z_repairiy74r.pdfIn PDF document text
    • http://kemijejanurag.iblogger.org/element_tv_tech_support_number.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/hd2ibch/brain_training_logic_puzzles_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gipakegabav/vhiG8ic/46197759348.pdfIn PDF document text
    • http://lassituda.online/pelco_spectra_iv_se_configure_domed7yoe.pdfIn PDF document text
    • http://videohost.space/el_cuarto_de_atras_carmen_martin_gaite_resumen_por_capitulosgcj48.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/gcB2Dgd/vodiworojanosivepunapom.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/jjghfeJ/kesuwurutaxobapudini.pdfIn PDF document text
    • http://trokot-shopnew.online/rheem_electric_hot_water_heater_reset_buttonqy7m0.pdfIn PDF document text
    • http://drnextact.xyz/what_to_look_for_in_a_water_flosserq36s4.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/UFjgChf/english_just_dance_2020_song_list.pdfIn PDF document text
    • http://dimax-matrasy.ru/el_general_naranjo_personajessv7z6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivekedifewu.rf.gd/ponakewiluda.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/gekijoxenuxexofomob.pdfIn PDF document text
    • http://nirobow.epizy.com/39607394617.pdfIn PDF document text
    • http://luwusifijusu.rf.gd/norerisirutejuzegagonesej.pdfIn PDF document text
    • http://mukovixajetunex.epizy.com/attagasam_tamil_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/cd_android._gradlew_assemblerelease_not_working.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_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 5384 bytes
SHA-256: 30e6a02fcc77ffb810cfdb52274c3648e4038adb91943761c104f9659af88d58
font_01_sfnt_off00011a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 11852 bytes
SHA-256: 3715155b3f4b55cc7471e81074cfa87eaaebdc1c00b6d8fb61eebe523ce853dd

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