Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47c65a291d77dbc…

MALICIOUS

PDF

71.2 KB Created: 2021-02-16 03:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1f6da02760f1b1ef7e2dddbf2fca9297 SHA-1: 320f75c90886edbd213ec61c7d64ac61faec8b0c SHA-256: a47c65a291d77dbce56bf7e9f52ab54bd7251dcf0f38cfba1768dbf606fecb09
104 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URLs and a heuristic for a "download button" suggest a phishing or social engineering attack aimed at tricking the user into downloading further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+reset+bios+weather+station PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458618/normal_5fe1bee9190b7.pdfIn PDF document text
    • http://jewlgems.com/likelafadusilajunr2g8v.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/gjjbhfp/93983132687.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/2asLINX/liziniwidimumori.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/I3V48ih/mtg_world_championship_decks_1999.pdfIn PDF document text
    • http://belkwigs.com/gems_of_war_soul_farming_guideqecis.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/sSqifyG/fukabereruvibumadufi.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/jhQih8H/top_40_country_music_videos_2020.pdfIn PDF document text
    • http://teksalle.xyz/297254353279ygok.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/fObFjjc/speak_to_voice_translator_apk.pdfIn PDF document text
    • http://susurrus.space/jogos_xbox_360_lt15ce7.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/jihbN46/start_em_sit_em_week_1_2020_kickers.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/zevutebulaworel/84045683698.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/sad_song_animated_2017_video.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/auto_shift_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/61173932154.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_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 4936 bytes
SHA-256: 71060fbc4af44df11e01c5f0daf825e212d88e6615694e2091af835b80930090
font_01_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 11020 bytes
SHA-256: 8ea89ad476ee6cbf6ad72663bce48b6de638cbe0e633020609b435040c5fff02

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