Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba3e5863215c533…

MALICIOUS

PDF

107.7 KB Created: 2021-05-13 22:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4981a63d836d4d5cab14942b2556146 SHA-1: 73150106310c00e4cf49de0c25938dc8e1bb64aa SHA-256: bba3e5863215c533025ac59db16da278e4df240a8184863f5121c03ffaa89289
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=all+os+systems
    • http://feyakast.online/nanavonumera1w9e.pdf
    • http://redpandarecycling.com/askep_space_occupying_lesionl040m.pdf
    • http://drenajkrasnodar.ru/76387730572whgfw.pdf
    • https://cdn.sqhk.co/fefamuve/qzEjctZ/62896605269.pdf
    • https://cdn.sqhk.co/pofoxubo/dgeBhg2/40406718996.pdf
    • http://hookup754.fun/lejagetgboo7.pdf
    • https://vejefipilarof.weebly.com/uploads/1/3/4/6/134663014/2628771.pdf
    • http://ig-copyrighthelpcenter.com/quando__domingo_de_ramos_em_202076f0m.pdf
    • http://igme.site/lapigafugoduvuropojesux2xo3s.pdf
    • https://jafusakivamo.weebly.com/uploads/1/3/0/7/130739280/1704305.pdf
    • https://cdn.sqhk.co/buzivafulet/TuibDgh/4k_wallpaper_hd_fhd_backgrounds.pdf
    • http://itsamorem.com/instrumentos_de_evaluacion_frida_diaz_barrigaj5686.pdf
    • http://free-at.pro/96749557822m2o11.pdf
    • http://podarokinsta24.online/41852613044f0dw5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2130825d-368b-4086-89b2-947c80e91c2e/luxijasagetewagivofamujet.pdf
    • https://uploads.strikinglycdn.com/files/ad44d01b-27c5-4dc7-bdfb-e85603a02c78/how_big_is_omnisphere_2.6.pdf
    • https://uploads.strikinglycdn.com/files/7cfb7d15-24f5-4f0b-8392-210bd14284b2/subdivision_meaning_in_english.pdf
    • https://s3.amazonaws.com/ladojenefe/autoroute_france_traffic_information.pdf
    • https://uploads.strikinglycdn.com/files/374ab93b-edb5-47b4-a841-df7c49eab19a/38778348124.pdf
    • https://uploads.strikinglycdn.com/files/1afdc9da-486f-4ab2-af07-493280c673ac/92725910137.pdf
    • https://s3.amazonaws.com/vutame/84010982017.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001628c.bin
e5397e415da82f82b2c45be7e5057a8f17941c319d57f91feaf36a0d62c3c38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1628C 4616 bytes
font_01_sfnt_off00017237.bin
6eab522566a9e1e62ac8bf8f08413440932f30393f978a68c20a4aa27072c2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17237 14720 bytes