Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f7096cd3db7478…

MALICIOUS

PDF

92.6 KB Created: 2021-03-16 08:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a70b6cf1158e4f90b1379ff5bdd82a36 SHA-1: 2293557aba1dfcca4c979c4e07eb7cb181a50013 SHA-256: 12f7096cd3db7478131ff7c80aa48bc0d1b3e3eabbc4a238e2e3bc757b1a5782
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. It uses an invoice-themed lure. 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 0.9988

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/award?keyword=types+of+bill+of+lading+in+shipping+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475572/normal_5ff274cb69338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_6045e34bbff3c.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/1576970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5ffcc947120ec.pdfIn PDF document text
    • http://joxuwevu.iblogger.org/hot_mix_asphalt_plant.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/06d4a50d48f325.pdfIn PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/7a5e0b65f6a0.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/2b81c5c63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5fdd38212d179.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fca92f4bb206.pdfIn PDF document text
    • http://karoxekixixaz.22web.org/factorising_quadratic_equations_sheet_1.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/buwosevax/matlab_plot_solid_circle_marker.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/14121951754.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/93338610975.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/attendance_sheet_template_ms_word.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/amelia_jane_books.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/46339754066.pdfIn PDF document text
    • http://lojupefiduk.epizy.com/6630831489.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/ingredion_annual_report_2016.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/mevuwaxuvodev.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/appium_proxy_android.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/jajujedusevilewos.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/usda_healthy_diet_guidelines.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/70844434287.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/defimu.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_off000116a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A8 5400 bytes
SHA-256: ad2e26bfc060e81a6d4ac66f070f13889f83569847483ee9864cd0b94a6f2bcb
font_01_sfnt_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 11244 bytes
SHA-256: 1506df4da962e267cd77e649b058b37aaa1bc0615d552f988a7cbffa023c2636
font_02_sfnt_off00014f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F30 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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