Malicious PDF — malware analysis report

Static analysis result for SHA-256 59da0d3d653cb8bc…

MALICIOUS

PDF

132.4 KB Created: 2021-03-14 00:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146dd9f16ae09133b5ab22389797f39a SHA-1: 5309a857698d4b133b84abe92cb2d31a1e936885 SHA-256: 59da0d3d653cb8bca785371c1d5385c652782f698f20c10893bca8575fd3a37d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to manipulate search engine results or lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://soxebez.ru/wix?keyword=theme+of+short+movie+my+moon+and+sun
    • https://cdn.sqhk.co/kasunelebak/0jiheW7/prop_hunt_hide_or_snitch.pdf
    • https://cdn.sqhk.co/xuxovunevo/Uia3sSe/mutod.pdf
    • http://zexaribamemavi.sportsontheweb.net/xajakutabudivaki.pdf
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/2647f.pdf
    • https://cdn.sqhk.co/devurekon/hfgihdM/my_ufone_app_download_offer.pdf
    • http://dipunag.getenjoyment.net/a_night_to_remember_free_download.pdf
    • https://jenitexul.weebly.com/uploads/1/3/4/8/134859983/balinetefesasig-powefutatofajup-fufunulinobuso-bukeziduxaribik.pdf
    • https://cdn.sqhk.co/jigavozef/K19ib8E/lenovo_ideapad_3_14_review.pdf
    • http://woxuruko.medianewsonline.com/breaking_night_audiobook_download_free.pdf
    • https://cdn.sqhk.co/besiwowegin/L1hg9IM/mifubiparililobolupixadam.pdf
    • https://cdn.sqhk.co/mofipife/cjdbNhi/vazaxaxibatel.pdf
    • https://cdn.sqhk.co/tabuguran/RrDEChb/40056994546.pdf
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/mitarezopefodi.pdf
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/gasopefepo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rofijukerogozo.rf.gd/how_to_connect_hp_deskjet_6988_to_wireless_network.pdf
    • http://zasuwunal.myartsonline.com/18589824739.pdf
    • http://jatugeset.atwebpages.com/vitamigifimupivanerovuvov.pdf
    • http://lamupimifuban.onlinewebshop.net/yoon_suin_blog.pdf
    • http://kajonamopesubom.rf.gd/analytical_method_development_hplc.pdf
    • http://pumonufagatoteb.epizy.com/gatanemadedog.pdf
    • http://jojudodadanu.epizy.com/action_games_for_windows_7_pc.pdf
    • http://zutugidod.onlinewebshop.net/61549662518.pdf
    • http://gakilasefit.myartsonline.com/35956607305.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ac51.bin
7e9a42242d3b740e26f94e79bc28d94f8d799ae1e4064b0d0a1f670bf05fa777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC51 6692 bytes
font_01_sfnt_off0001c332.bin
d013d2f82457c9272601dea2e208e8b76d0360042f1776ca41e0bdc2047b5bcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C332 5224 bytes
font_02_sfnt_off0001d4d9.bin
14398cf2392f49dc8581b126f97e6386e2f31aa4decd7b02046c25fb75e85f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4D9 13912 bytes

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