Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a2f3238a45e6ef…

MALICIOUS

PDF

67.0 KB Created: 2021-03-19 21:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2304fab89fcefe76a54264bb22bf693 SHA-1: bbc3654402e13a69a89fb544955cb36c75aa7330 SHA-256: f9a2f3238a45e6ef3c3666ade6934d6847bb7d91925888712753df4ec9ee3036
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, directing users to external URLs like 'https://resalured.ru/strik?utm_term=little+wing+eric+clapton+chords+and+lyrics'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=little+wing+eric+clapton+chords+and+lyrics PDF link annotation
    • https://cdn.sqhk.co/pasudajuwesa/goofyqn/tijuz.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/best_astrology_books_in_gujarati_free_download.pdfIn PDF document text
    • https://jupojunidukeze.weebly.com/uploads/1/3/4/0/134012404/tavuditanopowop.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/h9ibjfH/flash_bounty_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/iY5gfhc/notepad-_note_app_reminder-_colornotes.pdfIn PDF document text
    • https://xewikoleruwi.weebly.com/uploads/1/3/4/8/134897031/lamovelowa_zedogifavoxiti_lexubi_wugosivezezuwa.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/2388525.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/simomimagavutun.pdfIn PDF document text
    • http://vekojozoguduti.iblogger.org/zijonujejovedewo.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/murujazakiz.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/dapabiw.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/mubotagiv.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/d9275029-12b7-4661-978d-9ff9ad0c09a1/descargar_juegos_para_aprender_ingles_gratis_para_nios.pdfIn PDF document text
    • http://buluzapatevade.epizy.com/tarjeton_anticorrupcion.pdfIn PDF document text
    • http://lakekawe.rf.gd/leave_application_format_for_office.pdfIn PDF document text
    • http://risasuwoz.epizy.com/93662982339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b62dca-8cff-40f9-9ba3-6793f24d1aca/13791618454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ac3c91-f061-48af-b60b-8949ce458f0f/how_to_clean_a_miller_trailer_furnace.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_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 5468 bytes
SHA-256: c99905e82f90bbc32b496e10e13fd2044b6121ba47d5ccee615e0c9b58d582ad
font_01_sfnt_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 10284 bytes
SHA-256: a379cfce6864e40f135d629a0d5e09c724c2140017d63c5c865c39d4be0ceff2

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