Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cb0a4f2b6e7147…

MALICIOUS

PDF

72.1 KB Created: 2021-05-12 03:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84a438b91c41504285aa4c6fdc5e399e SHA-1: 700e488f4ab4ebc926855beb0fe7659ab088b67f SHA-256: 26cb0a4f2b6e7147a99107c3ebbff0c9b911079fc27c80f4a107fe5de93c1622
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 0.9996

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://baarspo.ru/strik?utm_term=how+much+does+maintenance+manager+make PDF link annotation
    • http://verifiedbadges-form.com/bejofamolisanugevaxaj9wosu.pdfIn PDF document text
    • http://trenolgia.buzz/street_fighter_2_pc_windows_104gwms.pdfIn PDF document text
    • http://2022god.com/96006746209cxk6n.pdfIn PDF document text
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/c1644db.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/3361778.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/segixudopitoli.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/jefazaxal/kafigufuvit.pdfIn PDF document text
    • http://xizoxenefodage.epizy.com/dufokupe.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/consular_report_of_birth_abroad_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/76276975697.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/28254702027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5bfbd8-d944-42f4-9df5-60f09bf5f49e/what_are_the_12_steps_of_aa_na.pdfIn PDF document text
    • http://zoniguzetixan.epizy.com/joking_hazard_number_of_players.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/97812882385.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/87352020325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ede8653-2817-4310-82d3-36b9ab9e184d/wikol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb98c613-38ea-4115-89f9-f0129e878904/dalasamojebamewifozejige.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/85490067543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b602087-fb58-4396-b34c-e9fd6a139bb6/murray_lawn_mower_parts_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1cc349-7a53-4b9c-b8d4-b7a1c00cef2d/lususen.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/alteryx_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 5440 bytes
SHA-256: 93e180ae5ec5027454265e881318d6a26d96328aab2d44d3d546979c04a6a72d
font_01_sfnt_off0000f019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 10112 bytes
SHA-256: 2a55f0318113b1d54618f453bcbcb63f256253e0ba1aee8d36ac78b2c785ac2c

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