Malicious PDF — malware analysis report

Static analysis result for SHA-256 5829a34b12eab846…

MALICIOUS

PDF

85.9 KB Created: 2021-02-25 03:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3422797be545e769d8a58443764dc73d SHA-1: bf7bae588a2b6db0bb56bda997c5c98f9ac59724 SHA-256: 5829a34b12eab84671bc6433924a7c69043998dc6af6ebb9241c39f63af46283
126 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. The document contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document is designed to redirect users to malicious sites, likely for downloading unwanted software or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://maypoin.ru/strik?utm_term=adobe+premiere+pro+5.5+free+download+for+pc PDF link annotation
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/6875016.pdfIn PDF document text
    • http://emirofficialzm.com/9200631583bvc52.pdfIn PDF document text
    • http://fruit-ital.space/basic_electrical_engineering_objective_questions_and_answersh8kbm.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/baruvifukojigufojobu.pdfIn PDF document text
    • http://webpost.pro/70608919266ztwk6.pdfIn PDF document text
    • http://jushq.club/tivolixexobekok9dmzk.pdfIn PDF document text
    • http://idealica-tufficiale.website/kannada_chalanachitra_audio_song5b7ep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fe68790af9d1.pdfIn PDF document text
    • http://luminar4-download.xyz/u_miami_covid_outbreakx6azj.pdfIn PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/e0817b7f7aa6.pdfIn PDF document text
    • https://vakevugulipew.weebly.com/uploads/1/3/4/5/134507067/bc470dd08bb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fe7501945331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5ff42b9a848e6.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/muxegeza/restless_heart_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/boro_chele_song_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 5500 bytes
SHA-256: 749005d51d5ab0f38eb5aae425c55cd1d0e413dce7e110afe98c4bc998d76ad2
font_01_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 10972 bytes
SHA-256: 7c04eeedfb89a2170b9814968b3f8774e89ce277cc295a4a18559bc4f98df4aa
font_02_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 16616 bytes
SHA-256: fcf5cf03075fe45ee1aa9e10002794be2d4aa61427b5695c4cb84c7bc7f55281

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