Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5f6faa7d6ca984…

MALICIOUS

PDF

92.2 KB Created: 2021-05-09 02:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f718106ed27a0bcd281239c56a7912da SHA-1: ee86d0c8c8e7036e05a2c7d8f63d9cd35a9389d3 SHA-256: 5f5f6faa7d6ca984e6d8de20c0afd7282481798d259365c3ba896dc3579baeb1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect the user to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=manual+tissot+t+touch+expert+solar PDF link annotation
    • https://cdn.sqhk.co/bedepekemat/NdheBid/carriage_kia_woodstock_georgia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481291/normal_5ff2dc5001efc.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/965967.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/2FihDVM/nupafosiwaresiboj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_60305fc722ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_6054205f9d940.pdfIn PDF document text
    • https://xupulepil.weebly.com/uploads/1/3/4/3/134322414/fegojekozus_wudetipetan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_603c308851e1e.pdfIn PDF document text
    • https://mekapejodefab.weebly.com/uploads/1/3/4/7/134740006/dosewevari-fesigomod-mutiwexizono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fd0edd2dd9d3.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/jevax_texuligapefuwox.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/defujo/70552761892.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/printable_family_therapy_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/jawbone_jambox_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/witusopuwojikawetebige.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/93930885479.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/how_to_reset_furnace_flame_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/58443562905.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/album_songs_new_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/url_http_._mantratecapp._com_forms_files.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/24547269732.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/adore_you_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/budaramol.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 1860 bytes
SHA-256: 8a02f7fa10c542e6925f3375967a0be20a8363d977fc0a299212d9b648db348d
font_01_sfnt_off00011ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA9 4976 bytes
SHA-256: 0306a73510a6f4a8e5d5c2417ad517e27bc4bbf8753f8a9ea2e0bc01cb602678
font_02_sfnt_off00012c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8A 11824 bytes
SHA-256: 71beca14d2485a8b14649dfd6a637120d7c63d343db0a7a4a092177d0c85574c
font_03_sfnt_off00015495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15495 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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