Malicious PDF — malware analysis report

Static analysis result for SHA-256 7026e6ebf3214d5a…

MALICIOUS

PDF

81.8 KB Created: 2021-04-09 07:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6c0bca935b2fc9bb40bc1ce2b43d3a63 SHA-1: 83977c53a8021ec2801eecc308e8e0b3e7eaba1b SHA-256: 7026e6ebf3214d5a47cd389f0b09f692284948177ade2cda4618f1de66e368c9
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://seumenha.ru/strik?utm_term=short+stories+in+english+for+esl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475588/normal_606ddc19bb155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_5fdb93a80f300.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/goveruduzewoxu/98474962641.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/wapibexinuzeroxenojopog.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_5dba8dded9a04b869ccfacc50725cc64.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_944f5771607347e58cab45706deeab23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/48474581448.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_fead29a149ac4c108fe91ae3913a73af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dumupa/appcake_but_not_installing.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/passkey_enrolled_agent_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/39535886703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26f499e-5806-4bb8-b6e8-c6ffd152052a/wufenuwukaraxojetad.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/cute_first_day_of_school_outfits_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/femizigojo.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/dowilibubejugoluvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfbcbd-16cc-4d30-ae68-75a7d1fba97e/gozadobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335ca491-d9be-4a11-b956-12921b42ea85/fixitafegon.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/rifominagoni.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/xibewodovudilapak.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 4924 bytes
SHA-256: ad605e8bd5d5cfd9262200ded9daff3695bef409c27de95b67645e41516d72a1
font_01_sfnt_off00011547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 10808 bytes
SHA-256: 300a459c904bc2407d61751af46d40714c491f9d79af1743d76f9e721889edb3

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