Malicious PDF — malware analysis report

Static analysis result for SHA-256 b485b58787b6e754…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 19:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ef89ba9346f05c1c8426de0316eadffc SHA-1: 5cc5509f936a13a0401ad7920a9ddbb7b6ca0127 SHA-256: b485b58787b6e754c3ecfd72d5797a10516f195775c464f47bd042d15c0531b6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, appears to be a lure related to fitness search terms, suggesting a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/123?utm_term=what+is+the+best+workout+for+back+fat PDF link annotation
    • https://cdn.sqhk.co/jisesixerigu/jaihfje/star_wars_wallpaper_galaxy_s8.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/hgF3KfY/foruwilexevafit.pdfIn PDF document text
    • https://fulopovesaj.weebly.com/uploads/1/3/0/7/130740112/4465895.pdfIn PDF document text
    • http://komarovskii.xyz/oraciones_para_adoracion_al_santisimnqutu.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/ogehahJ/nifekikopemibotimexukopa.pdfIn PDF document text
    • http://koprovk.xyz/the_shape_of_things_book_videopzvnv.pdfIn PDF document text
    • http://allieshouseofhope.com/79176647919b9dvo.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/theyghT/jabowuzumeru.pdfIn PDF document text
    • http://effektzhizni.ru/33288407052es8lo.pdfIn PDF document text
    • https://wodorolijuzawex.weebly.com/uploads/1/3/4/7/134770742/tikiwo.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/engineering_mechanics_dynamics_eighth_edition.pdfIn PDF document text
    • https://fevegukiso.weebly.com/uploads/1/3/1/4/131482975/vovejokowodak.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/jajakijazakorixivim.pdfIn PDF document text
    • http://fastcreditreport.info/did_lennie_mean_to_kill_curleys_wife8j47r.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/fifomi/android_tablayout_with_fragment_viewpager.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/sexinojowukuwud.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/xarobusekimorata.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/free_call_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/15512869611.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/sodastream_gas_refill_cylinder_60l.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_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 5244 bytes
SHA-256: d7c2ef167ff3105066a48c8b87dbdc96926029bf7a423c88ec618e191f5c5703
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 11344 bytes
SHA-256: e52654a50b45b087e0fb0cd516283fbf6bd0506f8f7a66b53ba561b0480831f9

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