Malicious PDF — malware analysis report

Static analysis result for SHA-256 f775aa55a78f9ac8…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 15:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8254dfe0a21be4f8d2d54d11b479c438 SHA-1: ef92d78c37bee37fe4eaa1179d023af1241f34d3 SHA-256: f775aa55a78f9ac8be69a20e1080017fa9f50299b983e578f015ac4bbc9331fa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://crophysi.ru/award?keyword=blomberg+dishwasher+ldvn2284+manual In PDF document text
    • http://grenkasalo4.xyz/doneduxabobazwfdtr.pdfIn PDF document text
    • http://generatorsale.ru/inclining_test_reportyqol3.pdfIn PDF document text
    • http://stickerrus.ru/gsmarena_iphone_12_reviewlvqp7.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/fichHif/cute_hairstyles_for_girls.pdfIn PDF document text
    • http://uscarins.info/oops_concepts_in_java_with_simple_example_programs27wcn.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/allen_carr_easy_way_stop_smoking39eol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_602ef0a9d07a3.pdfIn PDF document text
    • http://vermono.site/zopaxizipekobojopuzeguveoeji6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fcb10f6c842a.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/29387733365.pdfIn PDF document text
    • http://libertinemodels.com/pokemon_go_news_may_2020rpd8v.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/xisebonofugidema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453719/normal_5ff7ac6b85d25.pdfIn PDF document text
    • http://ionatr.space/time_travel_ielts_reading_passage_answersw99uq.pdfIn PDF document text
    • http://hookup157.fun/boney_m_song_daddy_coolucmxm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodegodonirad.atwebpages.com/60116242144.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/sanotiduximijiwifu.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/battleground_survival_offline_apk.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_off0000dfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC9 5996 bytes
SHA-256: c5fee5fb8d52288765d88b0177b6c9d04bae6e488481677859ab31f517e73f34
font_01_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 10168 bytes
SHA-256: 20dc3176322d173b1a0ab8367886aaddcbe8f4c0b19a14fa9e1ec4997e6a15c8