Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe7bfeddf44e73b…

MALICIOUS

PDF

75.1 KB Created: 2021-04-08 15:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5447d7b8d5bbe1ec8729b9678bdae09c SHA-1: 2a620826eec74bb5b1e7d07386e6d317779d72c3 SHA-256: bbe7bfeddf44e73b1070bb63fcbd111822358e3f8de217b8bc41780919b07ee8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm or SEO spam. The primary malicious URL identified is https://fokemale.ru/strik?utm_term=death+of+a+salesman+act+2+study+guide+questions, which is likely used to redirect users to malicious content or advertisements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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://fokemale.ru/strik?utm_term=death+of+a+salesman+act+2+study+guide+questions PDF link annotation
    • http://verifiedbadges-form.com/alarm_clock_android_studioc70ws.pdfIn PDF document text
    • http://icub.tech/little_fires_everywhere_book_vs_tv_show4i8l5.pdfIn PDF document text
    • http://aycotoro7.xyz/bedavukarepivumunetolub425j.pdfIn PDF document text
    • http://bezprovodov.guru/15912656105p4zel.pdfIn PDF document text
    • http://carishr.com/sharepoint_for_dummies_2016kyiu0.pdfIn PDF document text
    • http://copyright-help-center.com/eclipse_for_selenium_automationotcns.pdfIn PDF document text
    • http://1pokypki.website/58205899553kqvkp.pdfIn PDF document text
    • http://7evenrp.ru/gafutogogasaraxakiwiwawr7x4.pdfIn PDF document text
    • http://nonly.xyz/tokuvalawebupekexotu3bb.pdfIn PDF document text
    • http://pokemonrivals.online/what_is_an_sbir_grantg3ucn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a9d272-98a1-4ef0-8d07-a31fd524b776/marlin_60_scope_mount.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_e0285b43688046feb32168d0fcccc87e.pdf?index=trueIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_3302db12d5d34a1d8e53c1c1464c0901.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37192e5e-c830-4f10-8deb-208528c52135/71901277316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b07bc9-4a05-4c2c-96d6-55b463b16179/what_is_the_modern_concept_of_home_science_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44061fd3-2462-414a-8557-85dd5d8b8d8c/how_to_say_very_appreciated.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/lonavala_trip_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1741dc22-80df-4e2f-ab24-7de642b7e863/derivutininebizarepovawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8427af78-fb19-477f-8006-064a4e60fd07/freelance_writing_jobs_online_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/casio_fx-_991es_plus_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/nolidoxufi.pdfIn PDF document text
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_0cda27ca8bcd4c999f4590732fb7239f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/gejanigetomogixuked.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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 5700 bytes
SHA-256: ca66e221cd17435da9ddcaba6f6e6edee10e3f1e27778109a43d889502a02cb0
font_01_sfnt_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 10312 bytes
SHA-256: d09e856abc1b0e70cc0bc92776a8f31f35212ac15c379f174951200e01b49ee6