Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66f8641e328a5bc…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 11:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7b944044d1ea94e42d69c031f0b8f458 SHA-1: 9a0b5b58563b15e7c0a90f5a2253d1ba643bc3c5 SHA-256: d66f8641e328a5bcbbe2832e3c764971bce0459b76d14882d7e7dcfb103f8b67
104 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. The presence of a download button lure and an embedded URL pointing to a Vidmate APK download strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, indicating it was likely generated programmatically to host the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=vidmate+apk+old+version+2011 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426945/normal_600b4fa12dfa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_6031b0155ce4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_6002dbd9c137b.pdfIn PDF document text
    • http://apkweb.net/ye_mosam_ki_barish_dj_songbyqoz.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/sXridjj/sabofi.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/iIkKhic/ches_s_fish_and_chips_nutritional_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_600191e4d1138.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/hghh2nH/mini_gba_sp.pdfIn PDF document text
    • http://50offstore.pro/965308622gqp44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_603c77b9e098d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_60420da3ddf0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426271/normal_6008a36df172b.pdfIn PDF document text
    • http://robertferrell.net/644923521353f265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_6051286f39b49.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/bogeguva/meter_informacion_al_cerebro.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/dnd_druid_guide_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/wahl_total_beard_trimmer_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/bose_companion_2_series_iii_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/calculus_and_its_applications_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/tovufugirafodo.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/68754199260.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_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 5520 bytes
SHA-256: 4220ea848d0d55fb93f0b265e80af964d63383415af3dfd3c976f577fd8857c1
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 10916 bytes
SHA-256: 87568194c6d04931e02bc199002ec7000244c0cfce56fdde5c94f2624e9d8335

Open this report in the interactive analyzer, or submit your own file for analysis.