Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d64c7c8499c3825…

MALICIOUS

PDF

82.1 KB Created: 2021-03-09 02:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d11320c843bd56d31a1b71fe120a8734 SHA-1: 1958367c4745f16a1051a47a90825b0a11dffea5 SHA-256: 6d64c7c8499c3825d65b493e4f60b8d6e48a1b6c0be8e32489e003c914d958a3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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=beachbody+power+90+workout+calendar PDF link annotation
    • http://poxijirubulemax.22web.org/goodman_group_annual_report_2018.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/the_most_famous_songs_of_all_time.pdfIn PDF document text
    • http://prod-fruit.space/carmina_burana_scorebds0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495387/normal_5fdae8f1ae52a.pdfIn PDF document text
    • http://slmit.space/what_is_a_rule_12_hearinghoiqk.pdfIn PDF document text
    • http://erethiztzj.space/sevekoxadararofuboz2om.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/bakteri_enterobacter_aerogenes.pdfIn PDF document text
    • http://sukojas.22web.org/excel_bedingte_formatierung_geht_nicht_mehr.pdfIn PDF document text
    • http://crawlmqyu.space/18267738752583p3.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/alien_1979_full_movie_in_tamil.pdfIn PDF document text
    • http://moreprodukti.com/netgear_fvs318_vpn_setup1mx4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370074/normal_6001d7538d52b.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/zuvawafirapesitawurizesod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422378/normal_5ff22bdf6544a.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/characters_of_the_story_the_necklace_by_guy_de_maupassant.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telomilabevi.epizy.com/zelujizetoduzakovopokol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcb9b42-1c30-490e-b243-da10483f67ef/what_is_commerce_and_trade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e14062-c996-42ef-9675-651a12950c8b/napivexuvagojedev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2823a2f-707c-45c6-9d16-27f085b43631/vimudefiwegemivetaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bbd1ef-5203-4b20-af45-635ec45bc7f1/18062412102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e7d809-fc1f-4e01-93d8-65c8eb95264c/18186742804.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/how_to_change_power_steering_fluid_honda_civic_2008.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 5728 bytes
SHA-256: 195dc633f191ccef47f52d009ea7bb383c0ecbcc8cef08ba094a64c6f1ef1ba8
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 11148 bytes
SHA-256: e509d8da968806ec0edb4d2ebfe197e59951da59220fce62608778ed6a7bbbba
font_02_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 16168 bytes
SHA-256: 242633b00dc448d9f1a1c85ff42dca45651c506b10caaa74c4bbd73a060e7376