Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e984218007db1b1…

MALICIOUS

PDF

166.2 KB Created: 2021-03-03 00:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 866a577f262fdf1198268387bc6d10b9 SHA-1: ba81594595d8d489a3f05742a720c247eb8c9fcd SHA-256: 6e984218007db1b1f93bcd54ffac447f8406d8af04972c3676751530ac5c4ffd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a tactic to obscure malicious links. While no scripts were explicitly extracted, the nature of the URLs and the PDF's structure strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://jumiwimov.ru/aws?utm_term=weber+spirit+e210+vs+e215 PDF link annotation
    • https://jojapunopumaj.weebly.com/uploads/1/3/1/4/131482926/towevamalaguzut_kisuvaburup.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/sewirurukigavikopeve.pdfIn PDF document text
    • https://pimabebobi.weebly.com/uploads/1/3/2/3/132303226/xamutexasax-zobivatatepida.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ihhhdgi/guess_the_word_emoji.pdfIn PDF document text
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/welejekot.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/hjjhhig/sharkboy_and_lavagirl_robot_toy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5fdfbbad046b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5febe94c7c5ba.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/imhHiiv/word_jam_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/bjftjiT/battleline_tactics_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_600bf3e91d7da.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/vufuzewasi/background_music_for_slideshow_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/jiponome.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/best_online_video_er_any_site.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22674 4060 bytes
SHA-256: 7aed461afd2cd6290397edbac2d99e5811fd80f6d1ad4de72efa7784c78a8c5e
font_01_sfnt_off00023505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23505 5232 bytes
SHA-256: f4301d275e0ef8668587f11f73a1204a871463df6c31437783f472eaab45a3bd
font_02_sfnt_off00024702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24702 14400 bytes
SHA-256: f1680f4eb16d8b59ca47516217d9136acf38492d601beca6b9ad47c766ce0a6c
font_03_sfnt_off000275b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x275B4 16192 bytes
SHA-256: 4682b72f2afa33b20cf875d84024ffdd6778cb348d5560ed491e7fe37e149525

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