Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e7cff3cfe0dcdb…

MALICIOUS

PDF

93.1 KB Created: 2021-06-09 01:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 167d21e9f784ebabb38183f7f004167b SHA-1: 5f9412a42272ca84c5581d191241ee2fa1b116b8 SHA-256: 42e7cff3cfe0dcdbfacde636fe2e7f69cf82b1d389e9cc3aea0ca46ca699b9f9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary lure appears to be a fake download for 'Sims 4 pets expansion pack free download', which is likely a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/pbw?utm_term=sims+4+pets+expansion+pack+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451954/normal_6002208115655.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/bavoruf.pdfIn PDF document text
    • https://xopomosafeg.weebly.com/uploads/1/3/4/7/134732974/1098547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_601c6479ca195.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/6088177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463538/normal_6061d588701f2.pdfIn PDF document text
    • https://kojoridenifuzav.weebly.com/uploads/1/3/1/4/131406931/a4b5b30f8a0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_604fabf0ba387.pdfIn PDF document text
    • https://pobogovowot.weebly.com/uploads/1/3/5/3/135323888/7778356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6062e677b5a57.pdfIn PDF document text
    • https://lerivifaladadov.weebly.com/uploads/1/3/4/3/134334847/lusomepuvitavepum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_5fe77b1c1932d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473053/normal_60bff0a5399de.pdfIn PDF document text
    • https://befetoxakotupo.weebly.com/uploads/1/3/0/7/130738956/9f3e0d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5fc916205b153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2101a29-e702-49e0-836a-e9557194ab7a/molarity_and_molality_notes_and_practice_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a66f4ee-176f-4390-b5f1-b88fa3799558/27815806538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef50c2a3-cc1a-455e-8955-682ef57f7f26/navy_eval_input_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC8 3668 bytes
SHA-256: 3e98e49209fe2e9ffb8720b550b27f88bf5c307038443bfd1965c49e750f1d2e
font_01_sfnt_off00012bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEC 5716 bytes
SHA-256: 17d7918208d058be59f1b74f0d0bf6d011181f5f4ad7d8c165f65e2cd48fa6d2
font_02_sfnt_off00013f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6E 11672 bytes
SHA-256: 34f6b947cf85e16887e5ed168f131029767ea327e0e925a06d5d985445f5c26a

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