Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3d34ba680f9200…

MALICIOUS

PDF

73.5 KB Created: 2021-06-04 05:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f40eaec0c3bcb5a2f9be43c0f631e80f SHA-1: c7d5a28cedbc46ff47eae6d6589bbfa7a7499886 SHA-256: ad3d34ba680f9200b54ba0619f4ea54ec51e6a04e06d28a07dea308f153fab8b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious content. The primary lure appears to be related to movie search results, specifically 'Tamil dubbed horror movies 2019 tamilrockers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://catamma.ru/pbw?utm_term=tamil+dubbed+horror+movies+2019+tamilrockers PDF link annotation
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/6ce117ab18038f6.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/6535098.pdfIn PDF document text
    • https://lexujimejuj.weebly.com/uploads/1/3/4/2/134265975/lukekavituwuxusilex.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/3665457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_604003bab9535.pdfIn PDF document text
    • https://xunatopek.weebly.com/uploads/1/3/2/7/132710497/boputotonibotol.pdfIn PDF document text
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/7cadf8b79ee.pdfIn PDF document text
    • https://gebowajawuma.weebly.com/uploads/1/3/4/5/134582097/c369bd658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5ffe260994ae3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_6017383cce56f.pdfIn PDF document text
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/136648f5d87e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144503022/45738345501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ebc5195-f37d-4edd-8c60-dddf4f867c0f/67569204128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00848b68-4004-4070-9a91-80c986455586/libros_millennium_lo_que_no_te_mata_te_hace_mas_fuerte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6d7ebb-c86e-48b4-84b4-4b55b658e805/kifamaropomepedibure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cf6326-f80f-4a48-8aca-87dfc7343120/geloruxad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916539b5-6980-4747-9558-6aa329173e21/strategic_management_accounting_exam_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12eba291-095a-4d50-aad3-968d37d8f884/is_there_romance_in_a_darker_shade_of_magic_series.pdfIn PDF document text
    • http://nugewil.pbworks.com/f/57514088053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13888a1-9d3f-4059-ba04-df9a1618b911/90640509861.pdfIn PDF document text
    • http://pupowivala.pbworks.com/w/file/fetch/144426813/62458200751.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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 5872 bytes
SHA-256: 1417feb681b0b19b9213ace44298961a5f38f3fb8d51cfc5a70e62e1bdaa3033
font_01_sfnt_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 10916 bytes
SHA-256: b0ffb963d530b9e768141c4707469e3e17a5a862aa134491b808b4ea81d9ad13