Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aae2360ecb16634…

MALICIOUS

PDF

69.9 KB Created: 2021-02-26 01:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e50ca0e4fbbf2ddd3a1979b421b2be10 SHA-1: 0901cf0b378a544a3bc5a2e954aff54f34793128 SHA-256: 6aae2360ecb16634caf29748f1a4fe33643352ec296554b3cf0cb99ffbd6c847
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=warhammer+40k+8th+edition+rulebook+pdf+download In PDF document text
    • http://natlab.ru/dokenixavaveta5r60r.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/xivinojutisevale.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/82064665056.pdfIn PDF document text
    • https://cdn.sqhk.co/rodosidebo/lOzhhrj/lifepefovewuk.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/what_were_the_differences_between_the_three_colonial_regions.pdfIn PDF document text
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/438ad2fdc.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/f69a030475c.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/fd28dca6e5bca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fc73cb2b6576.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/xadafadegobelo.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/lanorolowu/18066016774.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/sevuladem.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/42057827901.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5836 bytes
SHA-256: 7ae6566d8999732870a03ddda29ac66d162e16979daf671ce80d574653c5475d
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10176 bytes
SHA-256: 89c65c4b90fe10eb7eaaf4f89b8f00fa5b7be1adc5e5c001ced550c9b280d594