Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5cd0bfda7f81c8…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 02:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d89f6ec406911957463e40782ab73b20 SHA-1: d1bd46f6b7c4401f6654377d43a17ee8da475d6e SHA-256: ba5cd0bfda7f81c878c96121aafec21193b719c9cacb694bb9d25155ba9da797
156 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 PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting it is part of a link farm or phishing campaign. The primary malicious URL identified is https://resalured.ru/123?utm_term=dark+souls+remastered+giant+dad+guide, which is likely used to redirect users to a malicious site.

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://resalured.ru/123?utm_term=dark+souls+remastered+giant+dad+guide PDF link annotation
    • https://karawabinu.weebly.com/uploads/1/3/1/4/131453718/1740934.pdfIn PDF document text
    • http://watercart.ru/ninururibomadipadawinou0oem.pdfIn PDF document text
    • http://repochka.site/tokenagrq6.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/bd6ab388fa23.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/tazow_xigixewamazowek_siwalowodijin_lusapopo.pdfIn PDF document text
    • http://gtmedis.com/how_to_get_to_mount_fuji_from_kawaguchiko_statione6l6i.pdfIn PDF document text
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/ruvakuboporan.pdfIn PDF document text
    • http://lulizukudomiz.scienceontheweb.net/city_alessandro_baricco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_fabe08ba3f2e41e789a21cad8fd5fcf4.pdf?index=trueIn PDF document text
    • http://ziwivazud.onlinewebshop.net/tawukifumekik.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/solajofomu.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/critical_path_plan_template.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_46be9d87d24840ddbd1537f5827b4318.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_01ec74af2f6a4d2f94dda21c3c59d82f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/canadian_multilingual_standard_keyboard.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_a0ba27dbb3f64c9788e56ac47a8fbe9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/bose_wave_radio_cd_player_not_playable.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/ginger_grammar_checker_free_for_windows.pdfIn PDF document text
    • https://6f0a1f77-3195-4c90-aae7-8e5805bb56bd.filesusr.com/ugd/f94fd0_d5aa276aaa5d47a0b274ec738372620e.pdf?index=trueIn 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_off0000f41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 5208 bytes
SHA-256: b32d9caf41a5ab1f324df95bc26a8326278fab7ae0e850f63a5361bfa13317e0
font_01_sfnt_off000105c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C4 10452 bytes
SHA-256: 1c6a84719015c960122e3fe9b8cc18d78907ecee2edf0f390a252d7275456c14

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