Malicious PDF — malware analysis report

Static analysis result for SHA-256 be84054007653d8d…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 07:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a695413a8d8571f0934dfe6dfbd618f8 SHA-1: e0c0926087b590584adfab61e01abe865238bf69 SHA-256: be84054007653d8d217cab1cff7390330a647b460f96b262955b31cc698b0ca0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to reference a driver download, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=lg+hbs+760+bluetooth+headset+driver PDF link annotation
    • https://segoluremu.weebly.com/uploads/1/3/2/7/132740478/8ad1b692a.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/28285598928.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/guvavel_sexoxag_lozupu_zofenodebosid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_60402c4b9ad73.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/cooperative_federalism_can_be_best_described_as.pdfIn PDF document text
    • http://watogoda.mypressonline.com/where_can_i_find_sat_practice_tests.pdfIn PDF document text
    • http://pl50off.info/general_tso_chicken_sauce_easy7b2e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5fe1e9820db11.pdfIn PDF document text
    • http://lagidonak.mygamesonline.org/85923870543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491671/normal_5ff8a1146736e.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/2c83bd1bb8b110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_5fda7fd794c1d.pdfIn PDF document text
    • https://jafiwivejo.weebly.com/uploads/1/3/5/3/135305612/keboladezo.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/how_to_factory_reset_a_samsung_dryer.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/bodulapanedomopat.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/panamawevesoloritsuh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469852/normal_5fe32c63b6604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef902c7-9be5-4b39-bd34-52918fde9d4d/59513293095.pdfIn PDF document text
    • http://telatojewoka.epizy.com/13291589208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d46af7-d2db-4b72-8b79-5c1b5a79823d/por_que_salen_piedras_en_el_rion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814bd3b4-76e0-4f2b-9624-e89e7a34bb8f/fundamentals_of_database_systems_github.pdfIn PDF document text
    • http://vagafalim.rf.gd/how_do_you_write_a_letter_to_a_soldier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421fda84-4351-4f03-a210-460ba8cff81b/tarzan_the_ape_man_1981_movie_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6057261-27df-4ee2-ad65-fb9ac987fbc3/how_to_unblock_numbers_on_my_panasonic_phone.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_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 5604 bytes
SHA-256: 148ae8db0574ae2402a16409167e6da5f198fce6e0f11ded0fc3bed96a88bb34
font_01_sfnt_off00010e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E60 12092 bytes
SHA-256: 246d65e746ddecfa010735926d7f736d6cb50914b13c14da7526e19c83bcd25a