Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c82ce752b0a4ec…

MALICIOUS

PDF

128.0 KB Created: 2021-03-08 05:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 15d21e3c0b644e8770b0203523972017 SHA-1: b0beb4edbdb8944416ac8ca95e15c5581b6ea1fc SHA-256: 95c82ce752b0a4ec8be4cec57fd8b65ac1048b1fb9d5b84c522b0337102fba31
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this file as malicious. The presence of numerous external links suggests an attempt to direct users to malicious sites or to manipulate search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=agile+software+development+methodology+steps In PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/b371ad767a1240.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/wejodagizi-sunamiwa-zaxegij.pdfIn PDF document text
    • http://dududuw.mypressonline.com/stihl_blower_bg86c_parts_list.pdfIn PDF document text
    • http://mofolaz.22web.org/how_to_adjust_crotch_buckle_on_evenflo_car_seat.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/what_is_the_formula_for_half_life_in_physics.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/358d8651a0cace.pdfIn PDF document text
    • https://kutabafimuv.weebly.com/uploads/1/3/1/3/131379381/bixonupovojiv_ribesa_zejunuxaxix_welidi.pdfIn PDF document text
    • https://buwipifigidorip.weebly.com/uploads/1/3/0/8/130813409/varol-xonibowasuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladipuxot.rf.gd/verathon_bladder_scanner_user_manual.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_cbe8e15a71b346cf805c462ef6c639ce.pdf?index=trueIn PDF document text
    • http://tutivute.epizy.com/accounting_software_for_restaurants_free.pdfIn PDF document text
    • http://wovutemikinodow.rf.gd/matematica_analise_combinatoria.pdfIn PDF document text
    • http://safatagikev.rf.gd/nozirumi.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/hot_butter_popcorn_song.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_27dc9b58542647eba746c6172ee93797.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_6426a64f03a5478d8d8761d0ffc78070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotenu/robert_shaw_thermostat_installation_instructions.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/how_to_reset_lg_top_loader_washing_machine.pdfIn PDF document text
    • http://murarefap.epizy.com/confluence_wiki_page_templates.pdfIn PDF document text
    • http://benijumenulizu.rf.gd/how_do_i_reset_my_ge_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/analisis_de_sensibilidad_definicion.pdfIn PDF document text
    • http://netuvorib.epizy.com/88284074446.pdfIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_82852ea5bc9b40f8ad98c24a157bd048.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_a341096caf46479189397e6825ce458b.pdf?index=trueIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/what_a_word_for_listening_devices_in_movie_theaters.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_off0001b6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6F5 5696 bytes
SHA-256: dc2b113e18c1399e156b5a7039182cbfb91c93676ec27201891d18e051446926
font_01_sfnt_off0001ca54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA54 11792 bytes
SHA-256: 79aab000338d036a0a9dc4414a96ad8d3a426c7091c7268283f4b911442ead44