Malicious PDF — malware analysis report

Static analysis result for SHA-256 72eb7f49acbe4a0d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 12:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28b5c75c81445fb0493030a7ee7ab1c6 SHA-1: b03e26c2b4ba8d0cb666f45ffde1363fe27103e3 SHA-256: 72eb7f49acbe4a0dc5d7645915c7e9711ca5f6a8119d4db52481352ae7c685e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9954

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://resalured.ru/award?keyword=convert+cdf+to+pdf+r PDF link annotation
    • http://pasadurasasagi.medianewsonline.com/rajilafatibedonikaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601241aecb67f.pdfIn PDF document text
    • http://organicsss.space/how_we_decide_book_reviewa5juf.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/adverbs_of_manner_vs_adjectives_exercises.pdfIn PDF document text
    • http://disozire.mygamesonline.org/how_can_i_get_six_sigma_certification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_602713b0d4587.pdfIn PDF document text
    • http://fastpeysistem.online/822572637246nhrk.pdfIn PDF document text
    • http://damita.fun/3988449779szz41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_602556a5da9aa.pdfIn PDF document text
    • http://circulyarkadigital.xyz/weronuzujuragosilafucfv51.pdfIn PDF document text
    • http://fresh-ita.fun/mobiwkom8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_60307088d7a58.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/tixugudarotep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fd0fad600a86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/high_density_foam_sheets_for_tool_box.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/27419277949.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_cb4f5e8321a74f1fb0f3bd8a082d2c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/68688710486.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/47344885837.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_81acaceb13c942f9ba8ad654f413a805.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/porebigutawejowoso.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/cadena_alimenticia.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/how_to_replace_heating_element_in_ge_spectra_oven.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_9667467112f04f839ad8fa66802f3d2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/46778193009.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_fd2439eb6db04a6ab367fd41f175e1aa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 4552 bytes
SHA-256: 97ba8b3b31d4d2598239b14532071789023c5b320e38d020afb23a6de06f8488
font_01_sfnt_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 10780 bytes
SHA-256: b26ce9c46302d7438646cd59cdfade76fc272c279e8a259566439d46979e820f
font_02_sfnt_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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