Malicious PDF — malware analysis report

Static analysis result for SHA-256 86184219a66c5f54…

MALICIOUS

PDF

83.4 KB Created: 2021-05-25 01:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 603427a00bcf6b5258212237035eaacb SHA-1: 9a02d4f5e08820e46ba9de0cad4ac97e070e9547 SHA-256: 86184219a66c5f5480ec3f8f9051d30dbeb9c213915ddeaf8c8727a6c2c6d1d4
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 0.9998

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://xezojetit.ru/strik?utm_term=oncology+multiple+choice+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365563/normal_60265a233bc0a.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/8879743.pdfIn PDF document text
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/7657506.pdfIn PDF document text
    • https://nusuwexob.weebly.com/uploads/1/3/4/3/134352417/tivaxu_lovela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_606a3f7752d51.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/bezarotodimifiti.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/183740f0c.pdfIn PDF document text
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/sutugotedovi-jeweseridefog-woneriparox.pdfIn PDF document text
    • https://derodukiv.weebly.com/uploads/1/3/1/4/131453370/firejazofelav_batateponu_davenulo_givum.pdfIn PDF document text
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/jurur-tumitaxorupadog-taxemove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_606b6c2b91698.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/fosuderab_xizag_jovupodiwerotex_xemijis.pdfIn PDF document text
    • https://xibupitosuxusi.weebly.com/uploads/1/3/1/3/131380094/b13cb183.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/paropabaru/sitemazovaluna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8872412-3e18-4d69-be12-4ffc32fc7895/gawumaxikikolipigige.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/sex_and_the_city_season_1_episode_9_free.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/bhojpuri_chhath_geet_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/apple_watch_with_android_phone_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/harry_potter_book_club_pottermore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f335d65-f54c-43f3-8918-dbda9bd54696/69909553257.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 5796 bytes
SHA-256: d3064b461b1ef172eaad4a6e32d506fdce1b6e1cd758c5d5218641f4615a5259
font_01_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 11748 bytes
SHA-256: 571c21d5d2005c38d8d395bd7d287a7df530d60394e94ccc8970ebcaf0d5223a
font_02_sfnt_off000131b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131B0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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