Malicious PDF — malware analysis report

Static analysis result for SHA-256 e385555d4905f21d…

MALICIOUS

PDF

80.4 KB Created: 2021-04-07 14:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80f74d4e89c7c3194e7940e4d318319c SHA-1: 2a548fb2a48fd48d26746814db5d384ba2b42ac0 SHA-256: e385555d4905f21da5ebb33aed3ac2e1f3f21c70d55f5a23f6b44c1a25aef096
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The primary external URL observed is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=demon+hunter+guide+season+18
    • https://cdn.sqhk.co/wifilivemij/jd0Rgd6/72957876479.pdf
    • https://cdn.sqhk.co/retepisej/bW3lhbm/whatsapp_wallpaper_hd_download.pdf
    • https://cdn.sqhk.co/tovipovo/czggcAa/11985233688.pdf
    • https://cdn.sqhk.co/pawekenu/iQGidi7/the_third_day_explanation.pdf
    • http://konanozopesan.22web.org/94283445848.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ponivotigegepub/everything_that_remains_a_memoir_by_the_minimalists.pdf
    • http://tajemom.epizy.com/pelasazolosojirusorati.pdf
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_aaab5edefdeb456eb75936ec440da87d.pdf?index=true
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_648e777bb175462e970d74d770f6c3ee.pdf?index=true
    • https://s3.amazonaws.com/xoguwavosuje/how_do_u_eat_healthy_and_lose_weight.pdf
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_c6a774f1c16a434388eea5f3b0429481.pdf?index=true
    • https://s3.amazonaws.com/jopomodilamego/35698440795.pdf
    • https://s3.amazonaws.com/vezumobigodub/android_9_vs_8_performance.pdf
    • https://s3.amazonaws.com/tobaziw/pudoforofilipuvemifulujov.pdf
    • https://s3.amazonaws.com/suxuzubojut/bimapekak.pdf
    • http://fusifovizit.rf.gd/migixagi.pdf
    • http://demuremapinob.epizy.com/3724273003.pdf
    • http://kutegabirena.epizy.com/android_vs_ios_market_share_worldwide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa72.bin
f6063ad0792a0352ab9ed9ed15c550b19565be0d117ea031ac5b2f7fa27964a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 5452 bytes
font_01_sfnt_off00010cd4.bin
b8d3998e5db8cc5d83eb28762463e67b70cedca913d0c7f28e808eb08d4dc27b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD4 11352 bytes