Malicious PDF — malware analysis report

Static analysis result for SHA-256 df633c1fb3ddab31…

MALICIOUS

PDF

76.2 KB Created: 2021-05-21 03:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 870fb45d189d4dc2b69ae4ecb1fdd791 SHA-1: 1a131a63175ec0d649ad9fa456a1c2278db1af53 SHA-256: df633c1fb3ddab31697b93540cf60e4e176facd8fb2c5826c6a547fd496c60a2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with one primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what+does+the+chariot+card+mean+in+a+love+reading PDF link annotation
    • https://serijarivak.weebly.com/uploads/1/3/0/7/130776739/5858113.pdfIn PDF document text
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/wuzonikob.pdfIn PDF document text
    • https://luvagifewu.weebly.com/uploads/1/3/4/7/134766249/kixofo.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/dc3b9b6b.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/3601408.pdfIn PDF document text
    • https://roxuvipiga.weebly.com/uploads/1/3/4/6/134637137/sevezegi_bewopofajupiv_xewoxof_mifikolefafepox.pdfIn PDF document text
    • https://futikuvevu.weebly.com/uploads/1/3/5/3/135349420/1547729.pdfIn PDF document text
    • https://rofotemajanati.weebly.com/uploads/1/3/4/4/134497193/0e169ac47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesijesule/the_battle_cats_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/red_rising_book_1_chapter_summaries.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/pokemon_ss_leaks_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/leeds_council_health_and_safety_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/endodontics_principles_and_practice_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/isolation_of_genomic_dna_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/40299453790.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/fox_2_channel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/67892480958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fb374a-779d-4860-999e-496ed0f2d55d/97625136980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891c7d11-3641-4923-a8e5-65e8074852b9/zubujebu.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/31317156508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a633bed5-681e-42b3-936e-a46ef361d91c/what_do_lacto_ovo_vegetarians_not_eat.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/xumokumarezajuzudis.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/corppass_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/how_to_reset_zosi_dvr_to_factory_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/this_love_davichi_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/deralopevipabalidotizar.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_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 5428 bytes
SHA-256: e89be791a330d0f6292d4eebac459c98232e98d2829c78548e7402b6a0fbfacb
font_01_sfnt_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 10500 bytes
SHA-256: f2afaf4fa07ed386d7541b173ea4ba97bd8db3210a8a5922ca696cc88996c0f5

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