Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fe678181249e3f…

MALICIOUS

PDF

77.4 KB Created: 2021-04-06 03:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 46cd503e7e1006de83723bc066509a4e SHA-1: 993f5a084aeff5352c558c60695d9f738866ac2a SHA-256: 76fe678181249e3f8ebc892a6189c7fc828ac7e9864307d6d95f3bfc2b918fa4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9956

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://bologen.ru/123?utm_term=research+problem+statement+pdf PDF link annotation
    • http://bidizujimon.getenjoyment.net/98329025326.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/kane_and_abel_novel.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/skf_bearing_puller_catalogue.pdfIn PDF document text
    • http://nudabozijojoz.iblogger.org/traffic_report_10_freeway_santa_monica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wolujalazov.epizy.com/8515398525.pdfIn PDF document text
    • http://zuzimekot.rf.gd/article_review_sample.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_2137b88daa0d4a56ae1234d316975009.pdf?index=trueIn PDF document text
    • http://podemerobetalax.epizy.com/bogan_movie_bgm_ringtones.pdfIn PDF document text
    • http://fukevitadej.epizy.com/gotopituzeda.pdfIn PDF document text
    • http://davagutuvis.rf.gd/jufuvuzanogez.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_1d291b5e1e564ddc9744a84e9d579467.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/79596889482.pdfIn PDF document text
    • http://fekimemisuj.rf.gd/des_livres_pour_apprendre_l_anglais.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/vba_excel_save_as.pdfIn PDF document text
    • http://pibejonegipe.rf.gd/craftsman_lt2000_drive_belt_diagram.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_29f52ff48beb465f9e24be9ea77113e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/welding_skills_workbook_4th_edition_answers.pdfIn PDF document text
    • http://jatujij.rf.gd/mibivuzadisit.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/w3schools_templates_html.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_0e23e455774b4b318ecfc52de0caabac.pdf?index=trueIn PDF document text
    • http://jodonurinifos.epizy.com/omar_sterling_bimbilla_audio.pdfIn PDF document text
    • http://diwedowa.rf.gd/32361760288.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_bd51c1c494644e62996f40570abf1868.pdf?index=trueIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/kuxiwi.pdfIn PDF document text
    • http://dupunijasazo.epizy.com/86104916452.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/5350656329.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/28230282137.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_off0000eec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC6 5540 bytes
SHA-256: 97c9ea7d9bbdab41ad51b34d2a1e1c4ab35362bc275360613bcf5d5b48fe2d91
font_01_sfnt_off0001016c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016C 11200 bytes
SHA-256: 85d8ad398abc5d563d8e3eff0b5f0d3e15ca814ce0baa549838f59b122edb781

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