Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc549ecbda8d2523…

MALICIOUS

PDF

68.0 KB Created: 2021-06-11 03:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a5f032e236ee0f622628b3145ef78ca SHA-1: ed31a79889bca7bf69dfe80ea002cb62a8b6c1df SHA-256: bc549ecbda8d2523222318fd0a9c54544e346f2a0ffade6d83ff30ccb45a9c60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://crysiq.ru/pbw?utm_term=pirates+ii+revenge PDF link annotation
    • https://maduzoxunixeg.weebly.com/uploads/1/3/0/7/130775653/d3fe5259.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/gojukumotiwozox_desafineloji_nafutera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_6013b8289a5a3.pdfIn PDF document text
    • https://zosujugopaw.weebly.com/uploads/1/3/4/5/134509911/cb9fbbf36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fd88847a1322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5ffe2cb6aaf1a.pdfIn PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/ca285fc0a9.pdfIn PDF document text
    • https://gapemudumowew.weebly.com/uploads/1/3/1/4/131437765/zaregelisina.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4480880/normal_60b1d72ecf70b.pdfIn PDF document text
    • https://fuviwamirami.weebly.com/uploads/1/3/5/3/135351498/7833975.pdfIn PDF document text
    • https://vijidosuxidisad.weebly.com/uploads/1/3/4/3/134326963/wikowulemifaro.pdfIn PDF document text
    • https://gedibaforajipet.weebly.com/uploads/1/3/0/8/130874683/8913218.pdfIn PDF document text
    • https://easystreetonline.comIn 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/ee6ac5d3-9c54-4ee6-a30d-914475fe1049/xasokijugawadexerubibud.pdfIn PDF document text
    • http://gonumutat.pbworks.com/f/how_to_file_taxes_for_paparazzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15735ca4-7446-4163-9895-a573c1c7d5ce/1878519420.pdfIn PDF document text
    • http://zeladejan.pbworks.com/f/how_to_adjust_oiler_on_craftsman_chainsaw.pdfIn PDF document text
    • http://vogivakazela.pbworks.com/f/japexe.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144606882/diguvufuvalalokebak.pdfIn PDF document text
    • http://fisakujimet.pbworks.com/w/file/fetch/145098696/neet_2022_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5734684e-f386-4f8f-8db8-9f8d0b44505f/25043988427.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144730113/annabelle_2_full_movie_in_hindi_dubbed_download_mp4moviez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df47b5e5-78e7-4043-b5b6-bec913ff99d4/greek_gods_and_goddesses_family_tree_starting_with_zeus.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_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 4880 bytes
SHA-256: 6bac3818b48610b55705a11f4488cc47c00d3b3642d5cd5914f41a8c53b5d96e
font_01_sfnt_off0000ded9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED9 10616 bytes
SHA-256: bbf4724aa80e150a8e3f6f69410c0398fcd990c877100763359ae00424f94aea

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