Malicious PDF — malware analysis report

Static analysis result for SHA-256 3826a18a2b2e7fc6…

MALICIOUS

PDF

75.7 KB Created: 2021-06-08 19:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 25457f42954ba5dc6c8d42c3c3a5ab33 SHA-1: e8f118c1d4573030551d4a48dbeb1f6aeec78b40 SHA-256: 3826a18a2b2e7fc6db91ede54ab7d95d38e05feda7543a10bbc62e869dcad6bf
186 Risk Score

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 functions as a link farm, directing users to numerous external URLs, including 'https://queure.ru/pbw?utm_term=san+andreas+crime+city+mod+apk', which likely serve as phishing pages or malware distribution points. The PDF's structure and the presence of many external links suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://queure.ru/pbw?utm_term=san+andreas+crime+city+mod+apk PDF link annotation
    • https://naruvoraxosu.weebly.com/uploads/1/3/0/8/130873998/2966873.pdfIn PDF document text
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/c30aa76a.pdfIn PDF document text
    • https://mezamelakinates.weebly.com/uploads/1/3/5/3/135304028/begamitidafalar_wenawiv.pdfIn PDF document text
    • https://wigowaziralo.weebly.com/uploads/1/3/4/4/134498628/6924959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_605d747c42231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_60153dcd13051.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/dumumazafirizikuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_605a9bfb1c3e0.pdfIn PDF document text
    • https://nogapixefakul.weebly.com/uploads/1/3/4/5/134590999/2271481c60.pdfIn PDF document text
    • https://lepeposozul.weebly.com/uploads/1/3/5/3/135317560/figupamoko-tifudol.pdfIn PDF document text
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/puvabijom.pdfIn PDF document text
    • https://zunotebizi.weebly.com/uploads/1/3/4/6/134648513/df5eeb466f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5ff98ad7e731e.pdfIn PDF document text
    • https://sudejija.weebly.com/uploads/1/3/5/3/135390998/bajinokaginor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_60354a3f296cc.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/7480513.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/caecd.pdfIn PDF document text
    • https://xebokedobonu.weebly.com/uploads/1/3/4/7/134719403/75d7fb3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368760/normal_60b601ef84105.pdfIn PDF document text
    • https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/zunofexujolanixiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokadeku.pbworks.com/w/file/fetch/144829155/what_does_boo_boo_mean_in_a_relationship.pdfIn PDF document text
    • http://sikovifif.pbworks.com/w/file/fetch/144472542/can_kaiser_patients_go_to_urgent_care.pdfIn PDF document text
    • http://sojakun.pbworks.com/f/harry_potter_and_the_chamber_of_secrets_j._k._rowling_price.pdfIn PDF document text
    • http://rekadezabo.pbworks.com/f/frozen_songs_download_mp3_free_english.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_off0000e62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 5456 bytes
SHA-256: 7ec2ae80292a7052c0d299f9b378cd81333283ce688f724817db3cafdaab11ec
font_01_sfnt_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 11988 bytes
SHA-256: 6c644238af7dbd32a08982cf05125aa9f16eb9d6cd6f0ef43a42497633a599ff