Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9fbf95aa6a9d3a…

MALICIOUS

PDF

78.6 KB Created: 2020-11-13 05:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed18982420ef797c2af4e45e1ad9152a SHA-1: 0a472cf308a5b9c8db63665ef1d18d3c351deef5 SHA-256: 7e9fbf95aa6a9d3a281f21fa354e823460f9d6cf9dcc63ff9b54ea098b271ed3
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=despacito+song+in+english+ringtone PDF link annotation
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/fozub_jovomobegafabuv_tupajufunopos_zinoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5f9faf891423c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdfIn PDF document text
    • https://fokorakadugapo.weebly.com/uploads/1/3/4/4/134444193/redutofitimidaf-gozanapog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5fadf333aa049.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/198c460007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5f9ec2c465a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f9033da96c16.pdfIn PDF document text
    • https://lixudovu.weebly.com/uploads/1/3/4/5/134598000/fc11f413a7edcb4.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/woberiz/nuvesax.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/internship_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/thanks_to_god_for_my_redeemer_karaoke.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 5196 bytes
SHA-256: 5bc2e85ab468bcc52932137581b6b97c307943eabacb5c97e49a88eb04e8ec40
font_01_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 12564 bytes
SHA-256: 69062722011d084aa457e2f2c91e8fa2664c9768c110241a2ece9104bd843581
font_02_sfnt_off000113d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D3 17416 bytes
SHA-256: 3159a7b4afcfca9cd5a764538fc42a29f2b25572439f553e0d810945043571e9

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