Malicious PDF — malware analysis report

Static analysis result for SHA-256 455c8a6bad944e41…

MALICIOUS

PDF

62.9 KB Created: 2021-02-20 06:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a7246aef65e664d82ce0edbbdad399f5 SHA-1: 5842a4f718ef22eb9a98cfba8114ca65ef49dafe SHA-256: 455c8a6bad944e41541ddf3a19d4773548973c4d0080ce5e3648e1d750feeef6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wb?keyword=gout%20cookbook%20reviews In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5ffaa22694737.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/9368654.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/mPgcBii/lenovo_yoga_c640_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/giCjihb/gefapawabaduxam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_603018dcc94a4.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/bpXpT1j/sejuvesemesa.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/jQgcEjf/pet_dogs_hd_wallpapers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5fd27d02cbc4b.pdfIn PDF document text
    • https://tisavivo.weebly.com/uploads/1/3/4/0/134040567/ccafee476f8.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/9616205.pdfIn PDF document text
    • http://osmosiotzs.fun/segeneguvanosidegaramub61uzf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_602923baa7259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_60006bd53a988.pdfIn PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/3110304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/aarambam_tamil_movie_ringtones_free.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_off0000bca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA7 4936 bytes
SHA-256: b05db6207d7a366c8a027b52011a67d0a2ce843295144828df73342780e4aa76
font_01_sfnt_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 9776 bytes
SHA-256: e33d1984d1b44f8cad284a9d66c8d535c6294d73c3393cc7feb4e08fa0be69d7