Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ad6a0567627186…

MALICIOUS

PDF

73.7 KB Created: 2021-03-02 03:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 79ca70d5905bae1aec13c996a58fa1b2 SHA-1: efd1993fef4401b99b43f70f7f9d58cb03267cef SHA-256: f9ad6a05676271861b8e670225228026734437a9dc0a21c604455261271ea795
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to other PDFs hosted on disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to potentially malicious content, aligning with a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/award?keyword=vitamix+ice+cream+recipes+mint+chocolate+chip PDF link annotation
    • http://kengoru.space/borejafodetakilekanuwogsdbg.pdfIn PDF document text
    • https://xunasumip.weebly.com/uploads/1/3/2/6/132696393/wefoxoko-jovuradufaf-todixisovexu.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/gjfnXVS/travel_blast_puzzle_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/4cicBg4/red_and_blue_make_purple_song.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/povemavubujobe.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/xuwijagidofizafojiduko.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/bjdgjje/xosadamabomupexidukukom.pdfIn PDF document text
    • https://waperaterorug.weebly.com/uploads/1/3/0/9/130969933/rofoxelir-pemarimowodete-devaleforozot.pdfIn PDF document text
    • http://runmasten.online/kufuxufilijaefykc.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/bitinebaguwamelegulifik27oym.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/hgHLicW/free_stuff_times_square.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_600d11960457a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_603c82f0349c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450347/normal_6007399ccca76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zutugidod.onlinewebshop.net/denon_avr_1712_manual.pdfIn PDF document text
    • http://botovomevagexe.epizy.com/free_printable_1st_grade_word_search_worksheets.pdfIn PDF document text
    • http://ninoxodibigadar.epizy.com/basapiwuwu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 4992 bytes
SHA-256: 07449845bb00b2ae3bbf4fc2950b599f6be8a7b10007f14c9978a223269b4f3b
font_01_sfnt_off0000e837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 10192 bytes
SHA-256: 7ee0e93df9049d2d985d4413e29eaeefbd98da5838065b3100785c8b25f1688b
font_02_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.