Malicious PDF — malware analysis report

Static analysis result for SHA-256 2720564034b2c686…

MALICIOUS

PDF

83.9 KB Created: 2021-03-24 17:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ca144f994fae4f04379a8f03d84ef7cd SHA-1: f457a2565a94195ac50d28dd0c4e3217edae69b3 SHA-256: 2720564034b2c68613ae2786342c75dbbc735a19d3684d0ef8c0195179836ccf
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to disposable hosting and are designed to act as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high number of external URIs indicate a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/aws?utm_term=how+to+fix+a+wine+fridge PDF link annotation
    • http://wilitubejibo.iblogger.org/11729063471.pdfIn PDF document text
    • http://omoikiri.info/magnus_chase_hammer_of_thor_read_online_freelu0m2.pdfIn PDF document text
    • http://nususolajegak.iblogger.org/3652711054.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ZZjgshd/papers_please_theme_orchestral.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/IibW0bS/jimedesepawopotuwulu.pdfIn PDF document text
    • http://sayseedokg.com/what_is_web_service_real_time_example09cw5.pdfIn PDF document text
    • http://visanekis.iblogger.org/crystal_oscillator_datasheet.pdfIn PDF document text
    • http://eduha.online/behringer_xenyx_x1222usb_price0v5lo.pdfIn PDF document text
    • http://wasodez.22web.org/97149040986.pdfIn PDF document text
    • http://wotomonexu.22web.org/fimuzusisujawopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://powuruzi.epizy.com/60414476763.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_af279b1f810e438badd3cfe7ffd2491b.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_7ed900cfe252422aa01ebc4596844fc0.pdf?index=trueIn PDF document text
    • http://wuduzinemaz.rf.gd/59051992706.pdfIn PDF document text
    • http://raseloxezonavo.epizy.com/kirchhoff_s_first_law.pdfIn PDF document text
    • http://wusugan.rf.gd/tuxise.pdfIn PDF document text
    • http://zewixezix.epizy.com/year_under_report_meaning_in_marathi.pdfIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_e638947791ed4e75b3bbea8902aefe55.pdf?index=trueIn PDF document text
    • http://filivuso.rf.gd/pikowajivutedetada.pdfIn PDF document text
    • http://sizipiloxubit.rf.gd/zediza.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_bc61e49210d748c18f310d28e47a1f9c.pdf?index=trueIn 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_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 4984 bytes
SHA-256: 4c894722302aead5e46bee86c44ec33a667468dcdeea50ae81762666759f29f7
font_01_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 11548 bytes
SHA-256: 7d22fee1aeeb66c3ec5ac46015f480c570dda08812fd3f5cf72abe6e3e80e30f
font_02_sfnt_off00012c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7B 16292 bytes
SHA-256: ea9f593ceefac5d57b607b813fe2c1d76cf233ba6380d680f37e45ee7528d58c

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