Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bee94ce65ee664…

MALICIOUS

PDF

77.2 KB Created: 2021-03-01 14:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 148843bf084e0afcd5644aa64cab0770 SHA-1: d796587e92415f54d9232944d1b3e0e28682e756 SHA-256: 84bee94ce65ee66455a3e9b2bed369b7f4118b50fe56ab009e1956a3c8c98c06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=sailrite+fabricator+for+sale PDF link annotation
    • http://muwikobifeke.22web.org/zawazazisafabajuxigasap.pdfIn PDF document text
    • http://hushseo.online/61645040006zchyn.pdfIn PDF document text
    • http://6gusevshop.space/custom_roms_for_android_tvayvk5.pdfIn PDF document text
    • http://getubij.66ghz.com/beautiful_baby_girl_images_hd.pdfIn PDF document text
    • http://plusstore.pro/mojopotebikapujihp1er.pdfIn PDF document text
    • http://gowitobo.iblogger.org/hitchhiker_s_guide_to_the_galaxy_series.pdfIn PDF document text
    • http://miiliioner.xyz/43432031139lvh0p.pdfIn PDF document text
    • http://roxopazin.iblogger.org/bubamofavavepuk.pdfIn PDF document text
    • http://profibrend.ru/fulon5slxj.pdfIn PDF document text
    • http://anyita.space/45716938172c1gzb.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/how_to_reset_pelonis_space_heater.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/37905587070.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/rumokovutesoputopuxewop.pdfIn PDF document text
    • http://bilixovat.rf.gd/82169109844.pdfIn PDF document text
    • http://vomuvipovaridus.rf.gd/40218677839.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/how_to_reset_lg_top_loader_washing_machine.pdfIn PDF document text
    • http://vuvazapej.rf.gd/behringer_xenyx_2442fx_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/dafidotumebizakimawewejos.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/terraform_infrastructure_as_code_digitalocean.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/citizen_blue_angels_watch_stopped_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_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5116 bytes
SHA-256: c07a661f7ae7ba81dd15081b4eb84ae518e32cfcd3be5b537c3873adc53b8fca
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 10520 bytes
SHA-256: 1599a2238ebd077f6e513319c3a14e6d93979b1c125f335397ca5787ec0153c4

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