Malicious PDF — malware analysis report

Static analysis result for SHA-256 523ad3b8243b571b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-15 06:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4cf1f7938f5f6a39cde5927a9618ec2d SHA-1: ba7546c5c3b4d719297769f4f5f5f39be7983867 SHA-256: 523ad3b8243b571b803655fb6e3c154829120cac15d169d4f015ff5b19b8f18d
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URIs, including one that appears to be a search result lure for 'Spider man 3 psp file'. The presence of multiple disposable hosting links and a link farm heuristic further suggests malicious intent, likely to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=spider+man+3+psp+file PDF link annotation
    • http://dithetsen.xyz/68977880548o96to.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/jjihUJ3/ub_learns_login.pdfIn PDF document text
    • http://vienvozvrat.site/30224770242msxs9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5ffba08c26df4.pdfIn PDF document text
    • http://premial.su/wazomamukenogipefubezufsfyb3.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/Nm6jjhi/77832923413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_600a994493395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_6008f7e2af162.pdfIn PDF document text
    • http://eurofamily.pro/calatlantic_homes_warrantyh2um4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_60439536b6d5a.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/hjhjiiZ/free_music_download_website_with_album_art.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/hanxzii/grass_cutter_robot_price.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/jjidkgi/23698125171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwosotu.myartsonline.com/64016649581.pdfIn PDF document text
    • http://kavimefejemud.rf.gd/24945152620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8dc9cf-003d-4e43-bc8c-8ff4acd55f8f/58918340256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47b7c9b-0f1d-480c-945d-711251a6ed3d/p90x3_classic_schedule_with_ab_ripper.pdfIn PDF document text
    • http://kazaxese.epizy.com/arijit_singh_sad_song_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5792cd-828c-433c-bc1a-9aa4e36877c2/nofated.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/naming_ionic_compounds_chemistry_if8766_answers.pdfIn PDF document text
    • http://xomaxoritekopir.epizy.com/how_to_reset_netgear_wnr2000_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63839a8-cecc-4a3f-9b6b-92bcb7393637/39370791564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8601a99f-cea6-4ec2-9cc4-07a30d3cdb8c/what_can_you_not_eat_on_a_wheat_free_diet.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_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 5452 bytes
SHA-256: ee8e8cd9d1990b31cb73cce49bbb9a7109042cd2eb2251f72d2d1886edeedcb0
font_01_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 10880 bytes
SHA-256: a5ebee83239dbac57426061ec6eb03b8f3b9ef0e34f369efe6f9d54a69a51896