Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57cd376ff05c81c…

MALICIOUS

PDF

79.5 KB Created: 2021-04-17 21:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7c01214e63da7c130c368f4a08b14e51 SHA-1: cffa80ac5ee1331f7c587bab62a6b54e26124005 SHA-256: a57cd376ff05c81c082b137a34e8eb93b2f97b0ef4cb1dae65dd3b0f9906e38d
96 Risk Score

Malware Insights

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

The file was identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, suggesting an attempt to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URIs indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/strik?utm_term=is+raspbian+32+or+64+bit PDF link annotation
    • https://cdn.sqhk.co/fonizijodi/fLmsSfD/94933252034.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/hfvgj6C/favo_group_garden_city.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/uDhfnHB/directv_app_not_working_2019.pdfIn PDF document text
    • http://nowtorrentz.com/kafuwidorukumofadidigu4r0vk.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/TaarPZE/xilar.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/phfvihN/terminal_block_2._54_3d_model.pdfIn PDF document text
    • http://kofijomisenu.22web.org/basic_tactics_for_listening_audio_script.pdfIn PDF document text
    • http://freefire-gifts.com/how_to_change_time_on_dsc_panelwxvo1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimadiwiv.rf.gd/alita_battle_angel_movie_tamil_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/wetesokazokefoboxerebon.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/fipurixodafilekug.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/dexoriboj.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/avast_internet_security_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/16572332067.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/27755261389.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/69802479825.pdfIn PDF document text
    • http://legibevisavu.epizy.com/duraluwokezaxuletefosux.pdfIn PDF document text
    • http://zizakipu.epizy.com/rerada.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/80463417328.pdfIn PDF document text
    • http://sakupoje.epizy.com/batla_house_movie_trailer_video.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/ge_proficy_machine_edition_9.5_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/girl_babies_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/kefakofu.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_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 5396 bytes
SHA-256: ad59f9628c96ae4f12266f208917b0ff0928ef8dd0c356f41064a1c531eb2473
font_01_sfnt_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 11272 bytes
SHA-256: 5d0b4231595fae16b57ca827909e54db9fb4e9f86d447d7e3f474da232d52689

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