Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38d4cd830acde48…

MALICIOUS

PDF

75.4 KB Created: 2021-03-03 01:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 287c802c3cf454ab3832c5c2f62ae0a1 SHA-1: 0a78434eeb294b80f4b6d1db7d63c6c517a018d9 SHA-256: b38d4cd830acde480341b00c0f5efe13bf68a2e7d762e411ea593bcdf5e5096e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

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://druttle.ru/strik?utm_term=what+time+does+the+stock+market+open+and+close+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444377/normal_603e45d93dc4c.pdfIn PDF document text
    • http://trychambre.xyz/46099535306rlu3g.pdfIn PDF document text
    • http://xrootunited.com/78937183471s0xyi.pdfIn PDF document text
    • http://timurberg.ru/judith_butler_performative_acts_and_gender_constitutionpi465.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/bsa_hiking_merit_badge_worksheetik5ff.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/sokenagegf5mkv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5fe6b2206a869.pdfIn PDF document text
    • http://medyahanem.com/412986409000bw7t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_5fdf6bdb18941.pdfIn PDF document text
    • https://dexidete.weebly.com/uploads/1/3/5/3/135394420/7851428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5ff10cc5796cb.pdfIn PDF document text
    • http://onlinesos.tech/weather_report_online_map1ho8v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_6036bb6bf1302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_5fe110b1b5e46.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/tejuvonixag/apa_ethical_guidelines_for_human_research_definition.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_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5392 bytes
SHA-256: 7424f90d7c1f092872e4877ddc7e802d2cfc12e0f6823431d7ec345aca84a084
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10916 bytes
SHA-256: e56fe0dd3394ab15257c0027666a421817fb400fa9fde1840752aa85b020eb4d

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