Malicious PDF — malware analysis report

Static analysis result for SHA-256 439daeb6eb934a76…

MALICIOUS

PDF

73.1 KB Created: 2021-02-01 09:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 79c1df3629f7d273a2cf0da0c8811fcf SHA-1: 1d65463f2c0aa34cc57ac6a5c6cde8f82ed1a8b5 SHA-256: 439daeb6eb934a76e012812a179cae4ee8c599fa9e39bf3c3fd2fcbbb0df5601
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it contains an external URI and is designed as an MFA or callback lure, suggesting credential harvesting or social engineering. The ML classifier also strongly indicates maliciousness. No scripts were extracted, but the presence of an external URI points to a likely download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/aws?utm_term=face+report+link PDF link annotation
    • http://lngcliente.com/premam_tamil_movie_with_english_subtec5zr.pdfIn PDF document text
    • http://betixisu.22web.org/bukovemibawuwila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476127/normal_5fd04d3f675ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417029/normal_5fdfc9b98e00c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_6007581a2b601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5fdcc5d759824.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456389/normal_6004ef24311c4.pdfIn PDF document text
    • http://natlegend.space/cute_wallpapers_for_laptop_disneyxteju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6003dc115fcae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473419/normal_5feda0613e2f4.pdfIn PDF document text
    • http://wbigs.space/waruwogixnaji6.pdfIn PDF document text
    • http://stat-index-co.com/car_action_games_racing_2020_apkpd6f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418981/normal_5ffdc32db77c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rawozenagi.epizy.com/warcraft_3_full_game_blizzard.pdfIn PDF document text
    • http://laragusezeji.rf.gd/73314316925.pdfIn PDF document text
    • http://gugefojekasarul.epizy.com/akatsuki_wallpaper_android.pdfIn PDF document text
    • http://fujesotes.epizy.com/4306295992.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE5 4768 bytes
SHA-256: 81d10069cad2ee278f2ca4195fde6c809ebb35352760782171a416ba356737ae
font_01_sfnt_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 11140 bytes
SHA-256: bdf386b60e25f20b67f49a1c9c2b3095b3ca7b3ff5616642b12ec481bdf93116
font_02_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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