Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a31d49f06bd7e9…

MALICIOUS

PDF

69.7 KB Created: 2021-02-21 01:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6db10a1702c530305b3bbbaa51a22dc5 SHA-1: 69257ae45af3395329b6da30faa525f8c678af4f SHA-256: a4a31d49f06bd7e9839b9b4eaf5d33a08175daed2391746ad053560134ca00f7
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The embedded URL and document body suggest a phishing lure, specifically attempting to trick users into downloading an APK file. The presence of external URIs and the overall detection score strongly support a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=telecharger+alo+download+apk PDF link annotation
    • http://6gusevshop.website/2037318434lqehs.pdfIn PDF document text
    • http://baugroup.info/fozesiwosik4stex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_600f4d59e1597.pdfIn PDF document text
    • http://arendagg.xyz/5120393803zqlef.pdfIn PDF document text
    • http://rubyshup.space/fekarenipojukukelisogh51tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5fe2dbadc7330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_60293ff97e0fd.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/jighe0z/51832491204.pdfIn PDF document text
    • http://save50it.info/mubedinogugaxoxgtawh.pdfIn PDF document text
    • http://greyfruit.space/medobawuwenuselimoy8col.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/pegebunov/cheetah_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/maryland_attorney_general_power_of_attorney_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xilerimubasibibi.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/44805469543.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/zorobageluxijotoritiro.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/free_movies_online_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/lokovavoludanowamozuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/homophone_worksheets_for_6th_grade.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_off0000cee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 5264 bytes
SHA-256: fb734140d09f342a28b8c4f6378796aeea61c1051c2addf67e31dc76ab1651d7
font_01_sfnt_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 14656 bytes
SHA-256: 54cd9880b3602d10c0da430ec0388287975e1bbbdc2a8a7cd7d38f4c807e14cb

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