Malicious PDF — malware analysis report

Static analysis result for SHA-256 345e3ae0cc1618ba…

MALICIOUS

PDF

78.8 KB Created: 2020-12-25 23:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cfd9e957e77f99b3f4960c66f90427eb SHA-1: ec3f248d9500c2aceb8d0a0c1da08dc9f555147d SHA-256: 345e3ae0cc1618ba199cd9ae72d8c814d6c529ed882e9355229562f9553d01b2
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed to distribute traffic to various destinations. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

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
  • 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://traffmen.ru/strik?utm_term=coast+guard+beach+rescue+team In PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/fukovurotoxamoze.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/rorabijudarovi.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/42425515d9.pdfIn PDF document text
    • https://jowamevo.weebly.com/uploads/1/3/4/5/134511132/7ad2dcf4627.pdfIn PDF document text
    • https://lenatazuponos.weebly.com/uploads/1/3/4/8/134888684/005274d883c75ed.pdfIn PDF document text
    • https://xomipuladijig.weebly.com/uploads/1/3/4/4/134401164/00b5f.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/8f477a.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/9909745.pdfIn PDF document text
    • https://fogumisekip.weebly.com/uploads/1/3/4/6/134688141/8494809.pdfIn PDF document text
    • https://tujigagozevako.weebly.com/uploads/1/3/4/2/134266307/tomekida-pugilamixofimo-dukakuxofitali-temafibumeruguj.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/xixonu/15745599166.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/german_accusative_pronouns_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91f8d43-629a-46ff-858d-f56d72aad72e/35577859990.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 3320 bytes
SHA-256: e076123a8494b9b6364db529f49be67bd25dfda064a42d8a1dea08a8b5047216
font_01_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 5368 bytes
SHA-256: bba0b606efbbeefd3f5fa808b854a04a90c09e5dda74a36da2b7198aa460a5c4
font_02_sfnt_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 10908 bytes
SHA-256: 1d77909425655b39ef2e4ed5daaabab8a72b39e116ac9c8ffbcc515527867428
font_03_sfnt_off0001184c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6