Malicious PDF — malware analysis report

Static analysis result for SHA-256 3941bb930255683d…

MALICIOUS

PDF

76.0 KB Created: 2021-04-07 13:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d97167550843035882bef4576849a9e SHA-1: 57315dd1820586cf1058ca0ddca887dec87b3a47 SHA-256: 3941bb930255683d1e58cb40271de21e04ef53efe19b23df1680cad0095d768e
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, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, contains text related to 'Feliz dia de los reyes magos mensajes' and application metadata, suggesting a lure to disguise malicious intent. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=feliz+dia+de+los+reyes+magos+mensajes
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd255281373.pdf
    • http://xedowoduwonaf.iblogger.org/lanuguxenabupibumiwa.pdf
    • http://fejevimajaf.22web.org/whats_another_name_for_car_ride.pdf
    • http://cadenalia.com/film_american_pie_8_sub_indogaezz.pdf
    • http://firstdoctor.xyz/chennai_super_kings_team_2020_sponsorsrge62.pdf
    • http://lakabusomasa.22web.org/how_to_clean_ariens_carburetor.pdf
    • https://cdn-cms.f-static.net/uploads/4473031/normal_6059906d8d41d.pdf
    • https://cdn.sqhk.co/femaxozimom/nqhcajd/82253016506.pdf
    • http://ranomurivokav.22web.org/denuvegetijogozun.pdf
    • https://cdn.sqhk.co/togokitaz/kjcjaji/japanese_alphabet_katakana.pdf
    • https://cdn-cms.f-static.net/uploads/4412391/normal_6056a7c894f5e.pdf
    • http://airet.space/what_is_a_nurse_practitioner_salary_in_canadaj8nw2.pdf
    • https://cdn.sqhk.co/jotapepikota/cgfwjd2/xml_auto_format_notepad.pdf
    • https://static.s123-cdn-static.com/uploads/4485718/normal_600826d0b3861.pdf
    • https://cdn.sqhk.co/jodariwem/ZN58hb1/aquoral_lipo.pdf
    • http://all-system7.xyz/679865984043oe7q.pdf
    • https://cdn.sqhk.co/medijamowole/a4fygv1/32222201051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92d.bin
dbbc78f1565d2cf092c5f1c1f26458e336d380a1c9d013cd3cf50f09ff5225a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 5328 bytes
font_01_sfnt_off0000fb4d.bin
99b6921b67cddc44b321d363093076a40cde1bd64bc267485fa13d8f55e9981e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 11596 bytes