Malicious PDF — malware analysis report

Static analysis result for SHA-256 192213f6c7f84dfa…

MALICIOUS

PDF

99.7 KB Created: 2020-11-30 21:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8edfa667700d7acba4d31432974c62a8 SHA-1: dbe5e27801ef57860e38666ef9146584f09e7084 SHA-256: 192213f6c7f84dfabb37a96be5560d8d682eee8994f4fbf36fabbedc5ce0db15
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=schoolboy+q+oxymoron+merch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393898/normal_5fc37f4746301.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/filodekojur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1e4ada6d74665ac6cd90/1606229581192/linchpin_are_you_indispensable_review.pdfIn PDF document text
    • https://s3.amazonaws.com/legolikagamop/paxizuwovegaxedevikekif.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/34802778835.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54aa9d79364840850716/1606374571923/morpheus_apk_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a50145a8629dc78f88b/1606294098188/19033922523.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/pakijuvisapexe.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/aptitude_questions_and_answers_for_campus_placements.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3963c12facd59cebdd614/t/5fc45cbd9b1ed0353868949b/1606704318055/62242962388.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1651bc89e1c4b8fc1e357/t/5fc2840d9d79364840df1232/1606583310342/weber_bias_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/classroom_games_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/tsunami_games_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/30362477218.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015473.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15473 25344 bytes
SHA-256: 50f2e234c00a7abcd759a12b99c211e60db3807c7ba6d1d4ace8956f2d9472ff
font_00_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 2888 bytes
SHA-256: 78885e247b1e7efa683895f67bcb90bf022b72a1a9e3ebb6f11a578be93ecb94
font_01_sfnt_off00011ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFC 5188 bytes
SHA-256: 4db25392c9bd6586fed12eaf6d4711eba4710a77748d9d043f849703ad00fff3
font_02_sfnt_off0001318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318F 10120 bytes
SHA-256: cbe134073dbd0046b05f3f916f139eb40eaeee0be221f9fb8dfcc7387e34dc28

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