Malicious PDF — malware analysis report

Static analysis result for SHA-256 d093ce79bc096ff9…

MALICIOUS

PDF

76.9 KB Created: 2021-04-07 03:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 00557a1da580b0f01d6c778db26671a8 SHA-1: c26243dfecab1ce6c95e229e83f5b63b2e259938 SHA-256: d093ce79bc096ff91f821af914c3498d03965a2604360cef077259c1e364a22b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=craftsman+dovetail+fixture+kit+2570+manual PDF link annotation
    • http://peuly.xyz/doxuw0ss45.pdfIn PDF document text
    • http://lnstagramoriginal.com/noworufivipisurur4hxx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465914/normal_5fda31b0a4cd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5ffb59b5795c9.pdfIn PDF document text
    • http://smartcreditcheck.info/tuwexizojikig32j3x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_60011fec74120.pdfIn PDF document text
    • http://vnds-super.space/32885515991ww2r4.pdfIn PDF document text
    • http://magnifioco.site/akcent_thats_my_name_instrumentalc85e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_6068e51a20bbf.pdfIn PDF document text
    • http://simimuvo.iblogger.org/apprendre_a_lire_le_francais.pdfIn PDF document text
    • http://bekotuselol.22web.org/ragatubazimaloterinefax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5fce2e7edb33f.pdfIn PDF document text
    • http://gitibew.22web.org/73061372252.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://venukaluxe.epizy.com/puzavarapimatawurodeku.pdfIn PDF document text
    • http://jokokisenekal.epizy.com/hazardous_materials_technicians_typically_perform.pdfIn PDF document text
    • http://rexalovujomorox.epizy.com/66940230410.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/nisexujexeniw.pdfIn PDF document text
    • http://worudaparupun.epizy.com/electronic_devices_and_circuits_boylestad_download.pdfIn PDF document text
    • http://lalowarereguwel.epizy.com/95408425931.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_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 5628 bytes
SHA-256: 71e4dc84466308471c86193ebe19587cc9b7f37d76349533e1979ee16fbb456e
font_01_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 10876 bytes
SHA-256: 02c064e4bef8fb195f696d6758ce5ea93a73930abfbe00c7d933e1cee73597df