Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42e18a3051fde50…

MALICIOUS

PDF

71.6 KB Created: 2021-02-19 08:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 255b5e71e55778c9d3cc9449b6302f30 SHA-1: d434b9eafdc35efeabe88e3ef0408b1e1d6d3c7d SHA-256: b42e18a3051fde505774b8c982ddfd7ea4f9e1229c7a04a62bb600ce52d918f7
126 Risk Score

Malware Insights

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

The file is a PDF document that exhibits characteristics of a phishing or malicious link distribution scheme. It contains a high number of external URIs, many of which point to disposable hosting or link farms, suggesting an attempt to obscure the final destination or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://bologen.ru/aws?utm_term=mcgraw+hill+my+math+grade+4+teacher+edition+volume+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464878/normal_602da74b4d183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481291/normal_602a8099c82b9.pdfIn PDF document text
    • https://mepokebifonamos.weebly.com/uploads/1/3/4/0/134096039/27290fc07d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fcecc662d693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_602d5b6d4b60a.pdfIn PDF document text
    • http://meleworofazob.22web.org/dedrm_calibre_plugin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446019/normal_5ffb215d087c7.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/bineja-bagemawusozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_600325482c765.pdfIn PDF document text
    • https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/gonabe_ganokimanage_zipemamowagu_xezopux.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/wigox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fde449007f75.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/viwejaduluter_gopot.pdfIn PDF document text
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/3d8ef.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/tekirujikol_wutapedesaxo_gabilijelam.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/jupoti/23544545663.pdfIn PDF document text
    • http://nupituf.epizy.com/rerawediposivanape.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/bhole_hai_bhandari_dj_song.pdfIn PDF document text
    • http://pegesij.rf.gd/radio_shack_mpa-250b_specs.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_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 5652 bytes
SHA-256: aac9ac3ceb67251bd831401a3918cd5f900bd3b33ef020cf7e2de413625de964
font_01_sfnt_off0000ec7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 10648 bytes
SHA-256: 5d30401edd87da2b2fcf18b1a1f14223a2c429a3b8454d9bd8682f15ace93ea4

Open this report in the interactive analyzer, or submit your own file for analysis.