Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a428708bd30d10…

MALICIOUS

PDF

67.7 KB Created: 2020-12-18 12:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 91e05a659ad1594534b62339d59f6a03 SHA-1: 94cb0a4011ffc3db41ca37141c4cb80c93db477f SHA-256: 89a428708bd30d10254db26869e4a417cb984210671cf03a78572fb67f9ca29b
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, with one URL specifically mentioning 'download minecraft 0.11.1 apk'. This suggests a social engineering tactic to trick users into downloading potentially malicious software. The presence of multiple external links, including one to 'traffset.ru', indicates an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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 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.
  • 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://traffset.ru/strik?utm_term=download+minecraft+0.11.1+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fbe6195c15d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_5fda026e39fe4.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/dugaseveginab_zikoz_jugunikebari_zadopij.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/perapovovub-woruwepadapanap-bupalowo.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/9b4577ff-5199-4378-beef-62285f1418f2/nomopilivifutulamumik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc1b8c39ee0f32b879336fa/1606531268270/98062026419.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fc83a30217b3604edd4c26e/1606957617554/hd_video_player_app_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e113e1-d843-44ad-9034-c7c6e4d3379e/melnor_water_timer_2_zone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b253a23-17ac-4e55-ac15-cf0b3334f17b/71518848853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd39b3a-8138-4f3e-9b2a-43547de3f0f9/nikunazuguxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa44c3e3-0ec1-4682-9763-40fc6c805c7a/quinn_the_eskimo_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0565c718-747e-4853-92cf-3403acf5594f/prefix_or_suffix_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e61299eb-4c5f-43b6-89ec-3e2d7c9e21f7/10593679456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43e9609-fd08-4868-ae3c-d3dcd6e6d653/jamunuxutaramexosukifozog.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_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 5504 bytes
SHA-256: 5952b6445ab59b14fbd664966c1f02eb6a041fd15bfc3ab1f3f5c45fd326b4b3
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 9908 bytes
SHA-256: 30cea0a0b2f41fb346fa91c31869168520a6e1cc17234f1e574ae6850553558a

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