Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dd4c89809b0853…

MALICIOUS

PDF

67.1 KB Created: 2021-02-26 02:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 71020c259b0d1dcf5346b1586834ab54 SHA-1: 44511960fab08a90af76ea90c81a06703aaa67f4 SHA-256: 88dd4c89809b0853e39900bdaa2a7f112415dc53cf86dd8072f9eee556476877
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://yafferge.ru/award?keyword=husqvarna+240+carb+rebuild+kit In PDF document text
    • http://electorat.org/fl_studio_12_old_version_free_downloadfb7ju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_602ef0af621a7.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/c690b7adf.pdfIn PDF document text
    • http://molotkov.site/pressure_washer_attachment_for_hose_amazon2p7je.pdfIn PDF document text
    • http://ital-tess.space/penewizoximusivifumorkpobg.pdfIn PDF document text
    • http://xitnet.fun/5984242139ieph8.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/lezitijazawetebed.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/nidebolozi.pdfIn PDF document text
    • http://leopolds.space/cost_of_sub_zero_pro_48_refrigeratorka4pu.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/cho_gath_guide_2018o40jo.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/nogosu.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/x1_dvr_box_dimensions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_600905ab55687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fed5d7f4638c.pdfIn PDF document text
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/dezufi.pdfIn PDF document text
    • https://fofonameg.weebly.com/uploads/1/3/4/5/134522304/refufev.pdfIn PDF document text
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/7889157.pdfIn PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/d68ba44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/nasb_vs_nkjv.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_off0000c682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC682 5644 bytes
SHA-256: 12ea6b661e2ac9be0a5f7da01ad3e3de648b841f19c9eb8eeff151131fd8355c
font_01_sfnt_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 10624 bytes
SHA-256: c6f64e53f4f733118f9be5fa331bba6dcc42b3525ed267cadaec14c348a878b3