Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4758eb3b40bd9fe…

MALICIOUS

PDF

85.3 KB Created: 2021-04-20 09:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b65583f026fc7a90aca60882b8a2efab SHA-1: 21ad01b88f9b5a57a5829187bbce36af36774fa9 SHA-256: b4758eb3b40bd9fe127e897fb1678f613e7bbc3ff2249998b1f418f6acbf3400
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=hypertherm+powermax+45+xp+air+requirements PDF link annotation
    • http://businessoutsourcing.org/how_to_download_minecraft_java_edition_for_free_without_tlauncheriwwpi.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/28653876919.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/glucolisis_aerobia_y_anaerobia.pdfIn PDF document text
    • https://kagunalikabogow.weebly.com/uploads/1/3/5/3/135350350/6267582.pdfIn PDF document text
    • http://allostar.buzz/alicia_en_el_pais_de_las_matematicasdg005.pdfIn PDF document text
    • http://hackins.site/kutapesudogepipazekuwuvef0288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386087/normal_5ff65e6592996.pdfIn PDF document text
    • http://copyright-securityx.com/fubivemuvifipijuwiwegaxua13im.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419832/normal_5fdeca136a631.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/darulibudalan.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/armatec_110.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/vomenutodiwi-rozajimerej-xilibonunewali.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/the_god_ask.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_6058a3e03eebc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_f7f8f7530c05415cb748794d07f5647b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78ec156-37d4-4501-b494-b273e874f5bd/85286950895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b056db-d725-4b83-874a-d5d2ac20301e/is_the_2015_mustang_ecoboost_worth_it.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_a0b204743de4428299f5f8649b0077d1.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_694775caca43426a9c225041c8c44a34.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_ac007ee5fe764fd698202a15440401d7.pdf?index=trueIn 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_off00010da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 5588 bytes
SHA-256: 58d0b8f5b7c8ca8338212144e77dc89946aec86686aa5acd19884b723bb23807
font_01_sfnt_off000120ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AE 11328 bytes
SHA-256: 03a12167472bcf59cbbe56aa4099d531303d1235fbf34c638e5d15cf6b5e4e50

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