Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6b97cdafc683dd…

MALICIOUS

PDF

85.1 KB Created: 2021-05-02 13:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 51822f23bbb6e4c32856bc77afa396d3 SHA-1: 0b497493cca061f8fff2b994886aa7e16cc8405b SHA-256: 6d6b97cdafc683dde5b54faa00005446da9c120b1604ad5c009f4c3fdffc3736
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/strik?utm_term=roomba+960+battery+charging PDF link annotation
    • https://tirusagoxavux.weebly.com/uploads/1/3/5/3/135329940/2383987.pdfIn PDF document text
    • http://lassituda.online/viguwebipadinituzutenimv3vsp.pdfIn PDF document text
    • http://feelslike35.com/76476884020tgb02.pdfIn PDF document text
    • https://vopuxobud.weebly.com/uploads/1/3/5/9/135974080/3f35c.pdfIn PDF document text
    • https://pedumukelogo.weebly.com/uploads/1/3/0/9/130969284/7c22cb4abdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5ff3ffd618210.pdfIn PDF document text
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/7ce3c68435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_6035b4d669569.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/dikugelinoge-wenuwavedidomal-pisakanitid-mebusumeremov.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/2451574.pdfIn PDF document text
    • http://beliyden.xyz/4379541375467w2n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_600e08e436d69.pdfIn PDF document text
    • http://options.expert/3094967758650ruu.pdfIn PDF document text
    • https://mibimosa.weebly.com/uploads/1/3/5/9/135959727/pijibozurakekan.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/6389222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_605c8d57cf340.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/4667660.pdfIn PDF document text
    • https://kazarebowuw.weebly.com/uploads/1/3/5/9/135972211/popepijotox_zetidile_jixubefa.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/d9f50bbff6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doxewadafexe.rf.gd/19492466478.pdfIn PDF document text
    • http://xonizud.epizy.com/auditing_books_for_b._com.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 5704 bytes
SHA-256: 63b34801e2e8f903c81b837697c1814459e1484a055b21c381575e035deccd2a
font_01_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 11908 bytes
SHA-256: ce058c3f49d9417c7ce98ab53a857a369c61e6acd72e383817838de7d9bf75d6
font_02_sfnt_off0001302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302C 16084 bytes
SHA-256: e5245523bd71a78e06ca3300da63f55ad096e28dd8c1a5e83e138be64f7d0aee