Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67cbe6e0296f19e…

MALICIOUS

PDF

88.4 KB Created: 2021-04-13 06:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 17e7b057a702f9d399658c38fe76c7e4 SHA-1: b4944a82167cd1767d76e6cd62a658530fefda09 SHA-256: b67cbe6e0296f19eaa34cde92119c22979ab752f4203d5bbb12164a6db95d926
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one prominent example being 'https://s3.amazonaws.com/tidigudetefumof/3079848378.pdf'. Another external URI, 'https://druttle.ru/strik?utm_term=eyes+have+not+seen+nor+ear+heard+song', was also extracted, pointing towards a potential phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=eyes+have+not+seen+nor+ear+heard+song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469119/normal_5fcc9e3ecada6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_60665aa472e45.pdfIn PDF document text
    • http://limevekobo.iblogger.org/twilight_zone_watch_free_online_dailymotion.pdfIn PDF document text
    • http://jirekakeduvinij.22web.org/bowebamun.pdfIn PDF document text
    • http://xoxeluwanogevi.22web.org/99868414286.pdfIn PDF document text
    • http://latomixoxa.iblogger.org/xiruvakon.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/tidigudetefumof/3079848378.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_fd8a498bf2474ddeaec5cf992072ce26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/is_there_a_recall_on_hyundai_sonata.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/ferik.pdfIn PDF document text
    • http://luwegovufa.epizy.com/former_archbishop_of_canterbury_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/defiwof.pdfIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_cba5218d3c2042e688c6f6a9d9df5aa2.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_627075d96b5145e483d0f7973df8f602.pdf?index=trueIn PDF document text
    • http://nonidimujosapa.epizy.com/zedekibefoviwavalitu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/minoturisoxisuto.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/hunter_kensington_ceiling_fan_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/bently_nevada_3300_proximity_transducer.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/when_to_use_negative_binomial_regression.pdfIn PDF document text
    • http://lisenezijigela.rf.gd/how_do_you_find_the_quadratic_line_of_best_fit.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_1ed7f26678e8486d988754c309296442.pdf?index=trueIn PDF document text
    • http://rinifujojutot.epizy.com/what_are_the_side_dishes_at_el_pollo_loco.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_da83f5b2e1b84fa280da6bd57e491e4a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDC 5176 bytes
SHA-256: 329d84a79180368229409829aff40e450e0b559992e0399736bb68599e03b9e4
font_01_sfnt_off00012f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F83 10680 bytes
SHA-256: 78372ae770600006da53b959a00a57be365488913ea6ff587ebdf3e69404366e

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