Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf2d4ffe7b14545…

MALICIOUS

PDF

83.3 KB Created: 2021-03-24 08:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 59727b0ed32f46eb57a98e59672fbe48 SHA-1: 747628a76d9fcac37c247a5f905b5ee98404f7e6 SHA-256: dbf2d4ffe7b14545dfa2519ac901ff9051fd77f0d4b29fcbbfb941f63dfcf2b1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://dugedepap.ru/wix?keyword=osrs+mining+and+smithing+guide+p2p PDF link annotation
    • http://justiciaforjustice.com/69602411248uc2z9.pdfIn PDF document text
    • http://keksik24.ru/bryant_furnace_error_codes_3165jks.pdfIn PDF document text
    • http://azalea.store/52779207507hnvlp.pdfIn PDF document text
    • http://vykupavto54.ru/xisasopanekatuveluzolofidu4ly.pdfIn PDF document text
    • http://pubaninuw.22web.org/dozulejorakan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_5606ee8250d743a5aea2865145761426.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_d04a5f99bf49427182d172d343a17128.pdf?index=trueIn PDF document text
    • http://dujepuxa.rf.gd/comfort_zone_therapeutic_infrared_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/multiple_filters_in_excel_spreadsheet.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_d1df8533924e49edad7a1d81ce2aeb21.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_405603b9e827417c8dcb7b3204877e25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/how_to_learn_design_in_mechanical_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ben_10_psp_games_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/alexis_carrel_man_the_unknown.pdfIn PDF document text
    • http://jasigobup.epizy.com/87486692157.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/toni_morrison_the_bluest_eye_critical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/66193649726.pdfIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_79abfcd624664a859df5ce11a5430ca6.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_8a6f22bce793443286fde7574d2b4334.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gulapore/91874002906.pdfIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_b7f640a06d06435a906f6eeef033e005.pdf?index=trueIn PDF document text
    • http://xobusifuj.epizy.com/is_the_boy_in_the_striped_pajamas_on_netflix_uk_2021.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_96ba2460303d4b49b50e3fd1f785ed59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/83545812946.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_8d3322bf808b470eae5b773606ab1aa2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povodijirig/86495295884.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_off00010813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10813 5500 bytes
SHA-256: feca57353ceb5aae89cf511292b0487dd8725e8fea5dc1625f5e5d971484c001
font_01_sfnt_off00011a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 10864 bytes
SHA-256: fd95747c3677d0881d1d8211c8e1d85bc4ce3799ef6512a32f39f29df12c4c44

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