Malicious PDF — malware analysis report

Static analysis result for SHA-256 74008311ebd69da5…

MALICIOUS

PDF

95.3 KB Created: 2021-03-17 11:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4221d68b6b3970eab8b1b99752e4c143 SHA-1: 1a1680b35bf673c75519ada2c2626673b4935b23 SHA-256: 74008311ebd69da5f3f92bc583b7f18933637d1c5302182d0c1cd48def31826d
156 Risk Score

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 0.9994

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://vilenefex.ru/123?utm_term=journal+algerien+echourouk+pdf PDF link annotation
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/e90862e.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/relogevugom.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/c317daeaec0b61.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/dimisotuwipizodive.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/hbNqvja/brick_disc_cutter.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/gdgeja6/free_ringtones_apple_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/AeHlgew/jurujaxiwami.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/gcJLgdv/home_design_3d_iphone_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/RPbsidt/17482532903.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/kisesefimunomuzixap.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/tutasujal/crash_bandicoot_1_100_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/mevimude.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/molaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/sumab.pdfIn PDF document text
    • http://divakupi.rf.gd/vofivu.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/lufidi.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/cds_form_date_2020.pdfIn PDF document text
    • http://kobizesamow.rf.gd/fijavulijekodobagil.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/business_communication_today_book.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/a_s_name_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/5855681433.pdfIn PDF document text
    • http://visiporogid.epizy.com/gaggia_titanium_spare_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013701.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13701 31012 bytes
SHA-256: 24e8ec1792a0249a48f4518902695de1a1896920bf42972e5634f82aa98fb483
font_00_sfnt_off0000fc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 5292 bytes
SHA-256: 7cd4fccc1c4a5b4e1496f8faccf877043549887954f074b1531f13bdba8d09d7
font_01_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 12668 bytes
SHA-256: bcdbb92358019846492ff47aff03e0f3366c5830df15a9fcc9765cd16d253429

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