Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a19517948a9658…

MALICIOUS

PDF

74.3 KB Created: 2021-03-26 16:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c2dee4f521f7218a4c081d79584f7729 SHA-1: 122037b8ce11fce1795143cd746e9e3c7c75c09a SHA-256: 56a19517948a96586765844e93599e58a599b2674ec385ab29913632cd801db9
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL that appears to be a lure for users interested in PDF formatting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or a scam. Although no scripts were extracted, the presence of numerous links and the overall structure suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/award?keyword=how+to+make+pdf+look+like+book PDF link annotation
    • http://putijeku.22web.org/kuxonisitun.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/gelggoe/gepunig.pdfIn PDF document text
    • http://nextauto02.ru/circle_of_fifths_print42y2z.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/icewcjc/39812719275.pdfIn PDF document text
    • http://bopodimo.iblogger.org/vintage_dressmaker_sewing_machine_manual.pdfIn PDF document text
    • http://zuvufikeluzodi.iblogger.org/sawan_bhadon_ka_gana.pdfIn PDF document text
    • http://detonic-ro.website/catch_him_and_keep_him_ebookclc0w.pdfIn PDF document text
    • http://keto-menu.online/how_do_i_reset_my_yamasa_slot_machinevfnjo.pdfIn PDF document text
    • http://mybestchan.online/21858101810jopbk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_dab9c11cdfb4473281f3eeb1f3441cd6.pdf?index=trueIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_551229d70b8145548e5eb8873a4bde23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/battlefield_3_serial_key_generator.pdfIn PDF document text
    • http://lixipixamum.rf.gd/40607959503.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_148ac25084824a3e8388c4eb68db5db8.pdf?index=trueIn PDF document text
    • http://fukokikedusej.epizy.com/firap.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_aaba071dbdac4d049f7c8fb756325a07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wolina/bellcore_tr-_332.pdfIn PDF document text
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_d5d43bf3a08d4c46aa5c6400e442fdba.pdf?index=trueIn PDF document text
    • http://jigosip.epizy.com/nonstop_ball_mod_apk.pdfIn PDF document text
    • http://widevuwototavu.rf.gd/tecnicas_de_aprendizaje_cooperativo.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5168 bytes
SHA-256: 3f8784967f91b0abda498523302b363fe43d304cd4b802ba12ac0f4fcc01c154
font_01_sfnt_off0000f4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 11560 bytes
SHA-256: 64ca628fc9c7f6ca6d6567cb94eb9086816758a455e8532b5db38a51e65d94c2

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