Malicious PDF — malware analysis report

Static analysis result for SHA-256 56643147c6f501c1…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 05:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71a93720c154dfc00278b7366c66ecff SHA-1: f6a71668564d751d034e90adee56010960ecce1b SHA-256: 56643147c6f501c1874340a65f3bf3f61be59059fd3c7611eeabe7bb83011d2f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://crophysi.ru/wix?keyword=eso+writ+vouchers+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_6023cb3bdbfbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_60250d846e092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_5fdc5b50d772f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_602786ca32e54.pdfIn PDF document text
    • http://femusawar.iblogger.org/agnathavasi_telugu_full_movie_tamilrockers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379379/normal_5fde2ec71d992.pdfIn PDF document text
    • https://nibonitet.weebly.com/uploads/1/3/0/7/130776737/3833981.pdfIn PDF document text
    • http://topijakalez.22web.org/36448055160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_6018e8a510fa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosovugan.epizy.com/75922787860.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/55996924382.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/5682429112.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/warazubixesidivi.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/chamber_of_reflection_sheet_music.pdfIn PDF document text
    • http://jowunimigafej.rf.gd/nogikusamufusilofoluper.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_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 4888 bytes
SHA-256: 1110c76540cc2472d82cf159774c194e1e3effec057d6651652df7ec56116335
font_01_sfnt_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 10408 bytes
SHA-256: e506c5282bd057ae7ff199e8c794e2c5b8cbf13218f9b520a3e220f6b8117a5d