Malicious PDF — malware analysis report

Static analysis result for SHA-256 90271089921e85cb…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 05:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3698b81621a6a18ea30b39b4a0df83b3 SHA-1: 76ce6d7fd4c2b4c94d05112c8746569feaae03f0 SHA-256: 90271089921e85cb21b748fae21aab2157533725255ffef181c78501586f04a3
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 0.9997

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://maypoin.ru/strik?utm_term=consumer+behavior+building+marketing+strategy+14th+edition+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5fdd8bfaa25fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_601aa45cc4d6c.pdfIn PDF document text
    • https://nefopebawobujo.weebly.com/uploads/1/3/4/3/134380481/856980.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/64abe534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5ff03f6a14ccd.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/nuzur.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/3997262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5ff5b8861b7be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimitudoxofi.rf.gd/xitirisolafekoxivasirebep.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/bejelekebo.pdfIn PDF document text
    • http://bolatufor.epizy.com/battleship_war_game.pdfIn PDF document text
    • http://livuwiga.rf.gd/bet365_apps_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/pakuwomuruvami.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/1031186749.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/road_signs_test_study_guide_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/65391117780.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/kegikumenegudewubuka.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/rapolorapiremexutorejerav.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/more_fewer_less_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/22551910666.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EE 5864 bytes
SHA-256: a49c8ecf127cd66293df4bb625f35d0a389506a652e902bb87f3304c9a2efe02
font_01_sfnt_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 11256 bytes
SHA-256: 019ce5d8011d743bf310f39b329fe8486a323761ad79deabfc9250a07b753d2a
font_02_sfnt_off0001103d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103D 16084 bytes
SHA-256: 7bb111f4ce79ba48502a837b83d40e55cd246b86015b702aadb01736ca16f5d3

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