Malicious PDF — malware analysis report

Static analysis result for SHA-256 48363dced81d63b2…

MALICIOUS

PDF

111.6 KB Created: 2021-04-04 01:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 006edaf4e6da0a6ca5e7e7128c4534d9 SHA-1: 1fc21fb07524366274fb9a2e3c5912bd68664352 SHA-256: 48363dced81d63b2d780c8473530d828dc758979d560b7ddf57266b7f62642fa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with many pointing to disposable domains and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=synostosis+skull+deformity PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/eGhiiic/35799890836.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/vurovafanudiwu.pdfIn PDF document text
    • http://lovewaits.ru/nec_dt300_call_forward_to_mobile9iujq.pdfIn PDF document text
    • http://bekokasutam.22web.org/uk_best_man_speech_template.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/jg1Ngh4/dukun.pdfIn PDF document text
    • http://idealica-ordina.site/3984173075aht9q.pdfIn PDF document text
    • http://testersairf.xyz/38727241005e8isq.pdfIn PDF document text
    • http://leree6.club/the_unbearable_lightness_of_being_movie_online_subtituladao42jh.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://shopeuro.pro/37460300006xlem8.pdfIn PDF document text
    • http://tizezs.xyz/words_to_describe_beautiful_rainforesthqwvj.pdfIn PDF document text
    • http://catsism.com/wuxugameromafamepeghxrrn.pdfIn PDF document text
    • http://lavkavkusa.store/zenanuladipisuloxokd338n.pdfIn PDF document text
    • http://jofijuke.22web.org/hollywood_reporter_newsletter.pdfIn PDF document text
    • http://pearhaidhr.fun/arial_font_free_for_macaxxxl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duziroro.myartsonline.com/symbiotic_and_nonsymbiotic_nitrogen_fixation.pdfIn PDF document text
    • http://xujided.onlinewebshop.net/paranoid_personality_disorders.pdfIn PDF document text
    • http://wijijatalil.epizy.com/26632738567.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/gosapuwagagibevekaku.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/jonometu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/59645104379.pdfIn PDF document text
    • http://joxowosikaze.rf.gd/gigivomodotukefifi.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/bosopadudevirajakatolibe.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/faceit_for_pc.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_off0001754a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754A 5112 bytes
SHA-256: bc4b638a013744f947a4b33fe25c85fcab87e50a381d1579c84a93dc1f13c877
font_01_sfnt_off000186aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186AA 12976 bytes
SHA-256: 586cf232acc3506c74bc44d88ca818f12b573412f198260508d34e7e7205af5d

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