Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd5b47841ab6203…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 02:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a818ca5fe315771579bb19f09299fa3 SHA-1: d9fb8df937eade70b551c5be505123501698b534 SHA-256: fdd5b47841ab6203543c1ead76a06118620de2fbda1b280fa3e605121409444b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=rohs+smart+watch+band', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for phishing campaigns. No scripts were extracted, but the presence of external URIs and the phishing detection strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=rohs+smart+watch+band
    • http://italiahot.fun/home_design_3d_apk_premiumr061g.pdf
    • http://bajoxuj.22web.org/calculating_empirical_and_molecular_formulas.pdf
    • https://zopokobo.weebly.com/uploads/1/3/1/3/131383813/1336599.pdf
    • http://romeoplanet.club/827677621522dwdi.pdf
    • http://websecurer.tech/sylvania_smart_android_tablet_portable_dvd_playern8ule.pdf
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/sebivaxegunim.pdf
    • https://cdn-cms.f-static.net/uploads/4484363/normal_5fe8a2fa14631.pdf
    • https://xagiwejobumumok.weebly.com/uploads/1/3/6/0/136051235/xunir-nekidule-korofodolejeg-difosopupipel.pdf
    • http://jazesenebadajak.iblogger.org/casanova_so_brooklyn_instrumental.pdf
    • http://ryukzak.digital/1080p_hd_wallpapers_for_androidra85d.pdf
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/gasibijogomebavav.pdf
    • http://kfnwejfnkwheklf.space/catbird_nyc_engagement_rings8jalb.pdf
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/1f804.pdf
    • https://static.s123-cdn-static.com/uploads/4412768/normal_600838bdbd4a7.pdf
    • http://masexuzijavigap.iblogger.org/vikupoxuradu.pdf
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5fd0e9f701c4a.pdf
    • https://guzajemifuraruv.weebly.com/uploads/1/3/0/8/130874286/losekewajik_wujego_julugaja_xelopekojudu.pdf
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/942f440debe6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://timarerovasezot.epizy.com/shell_scripting_tutorial_point.pdf
    • http://pikarofuwab.epizy.com/63551022865.pdf
    • http://lulatupesufij.epizy.com/air_cooled_chiller_troubleshooting.pdf
    • http://lurorozowuwa.rf.gd/afnor_formation_iso_50001.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded0.bin
af1faac4edf213704ac67f95ae914594ebf3f706b38aef9b4bed1d7a70441c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 2900 bytes
font_01_sfnt_off0000e924.bin
a5e91dc4b2bd1ccbc3dda96d02fff77cfaeea79dcab0c876f4cca1ac7c0b5a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5384 bytes
font_02_sfnt_off0000fb54.bin
2b6a9e24b35e4fd819371c6429dce6e6e05361aa214cd750e7c969e85e63c839		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 11236 bytes

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