Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e167b1eef066b9c…

MALICIOUS

PDF

76.9 KB Created: 2021-03-25 05:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b54c5f2ef3b2f0166beb956ff2e6ee7 SHA-1: b0f0fbaa5a1b81993a612230bb8d009dd6632c99 SHA-256: 4e167b1eef066b9cc56d9e48090392b13d94d31f85627f7ed447adb5f95d6d5c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/wix?keyword=how+champions+think+pdf+download PDF link annotation
    • http://pe50off.pro/burnham_boiler_partsuaisb.pdfIn PDF document text
    • https://fivipogokofabid.weebly.com/uploads/1/3/0/7/130776003/2313790.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/tabaxonadoluz.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/40629768182.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/5599221323.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/movies_like_jack_reacher_never_go_back.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/home_blood_pressure_monitoring_chart.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/tanidegejujapo.pdfIn PDF document text
    • http://nufivuzelikonax.getenjoyment.net/kala_bhairava_story_in_tamil.pdfIn PDF document text
    • http://segway-wheelchair.ru/38515194140lnqn7.pdfIn PDF document text
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/xotalobasit.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/15719440302.pdfIn PDF document text
    • http://jujavekerubeko.scienceontheweb.net/2020_buick_regal_owners_manual.pdfIn PDF document text
    • http://abzac.me/33069575132gw973.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/architectural_acoustics_david_egan_free_download.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/past_life_regression_meditation.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/godadakov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zutugidod.onlinewebshop.net/tafavudedoniloxurukofili.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/71789607678.pdfIn PDF document text
    • http://wififeju.atwebpages.com/26496665621.pdfIn PDF document text
    • http://tupesom.atwebpages.com/zeruxema.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BF 5088 bytes
SHA-256: 2af650402d4e154e2b70ff9c8abe81437db8500c0751a79837e4c9e8b7e335b8
font_01_sfnt_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 10668 bytes
SHA-256: 1e3b9050999daa94f75ae5521b9219585412bf90fd8e20001242de3f23141aed
font_02_sfnt_off0001182d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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