Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87412d30cde95cc…

MALICIOUS

PDF

76.9 KB Created: 2021-01-20 07:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f5b8b3e212b66f255d11714543c9c6b6 SHA-1: 2279774b042057c5a91b61dcde636f2485f0fd2d SHA-256: e87412d30cde95cc3c08bb8d2e03636fd4dca1ff1c7033a6fcae9b6c29023e27
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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://yafferge.ru/wb?keyword=stickman%20battle%202020%20stick%20war%20fight%20mod In PDF document text
    • https://rapugudunoxe.weebly.com/uploads/1/3/4/0/134012743/vugiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f89b93350d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_5fa04e8d0b6c5.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/duvowetebasilusitip.pdfIn PDF document text
    • https://bedaxeribijone.weebly.com/uploads/1/3/2/8/132814155/9127771.pdfIn PDF document text
    • https://site-1257088.mozfiles.com/files/1257088/bully_mod_apk_obb_file.pdfIn PDF document text
    • http://jinunagavep.iblogger.org/donutibi.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/bawolerez.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/zufabodaritudebuw.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/mekifu_bobozuburufi.pdfIn PDF document text
    • https://site-1173682.mozfiles.com/files/1173682/pigeon_attacking_baby_pigeon.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/begenezu.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/zajimiw-kolemutul.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/nezafepoke.pdfIn PDF document text
    • https://site-1171599.mozfiles.com/files/1171599/bsphcl_je_recruitment_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugepujato.rf.gd/sample_biodata_template_for_marriage.pdfIn PDF document text
    • http://zazisuj.epizy.com/68350792740.pdfIn PDF document text
    • http://piredesoki.epizy.com/46647665734.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_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 6108 bytes
SHA-256: 07b2526a0e3163dfaa907f6c5e16a283348cc50ee3358d87e7a4ea9f6c7bab2e
font_01_sfnt_off0000f1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 23168 bytes
SHA-256: da4f0c438ad4efe8eefc9b9c23355b366e8f6a40d5bab70b5831e8ad70da3481

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