Malicious PDF — malware analysis report

Static analysis result for SHA-256 303be40441342973…

MALICIOUS

PDF

71.6 KB Created: 2021-02-07 09:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4490ce2b04fe9e84ba4b3953f8433908 SHA-1: 3a8636bd4ef466e01ceadfa2db107ac5cc0e58da SHA-256: 303be404413429731653f96a4b73f2df5561232b6794e407218ed58b92dee9eb
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 heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction. The embedded URI 'https://jottigo.ru/aws?utm_term=churrera+manual+casera+precio' is the primary indicator of a potential phishing or malware distribution site.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=churrera+manual+casera+precio PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5fcd50990142a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_601977b4261b5.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/6wuHUJd/happy_birthday_my_sweet_angel_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/tavimuxeju/iTvmuif/wadaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403954/normal_5ff55c2bb321d.pdfIn PDF document text
    • http://mp4.design/bugatti_hd_wallpapers_1080pi7k35.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/ibicafE/christmas_bingo_app.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/tikoweravisixu/357488615.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/23475613802.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/bengaluru_today_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/carlos_yulo_gold_medal_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/rexokojopagad.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_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 5076 bytes
SHA-256: b429f5e4dc494d5bf3a3d496c0fa42dfe720a616165690095897c792bf5fa774
font_01_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 10580 bytes
SHA-256: 919c87295314a786be3252d90e2ad520645479334157c5434c7fb93d4ae71645