Malicious PDF — malware analysis report

Static analysis result for SHA-256 1577995e30b08469…

MALICIOUS

PDF

79.1 KB Created: 2021-03-19 17:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d3f70f2c5ca3b8dc771f9ba634ad121 SHA-1: 9aea885de6c1d3784d8c2a887d4a7bc9c656ceff SHA-256: 1577995e30b08469fcbb21a80cb7f38fb8cf16ab2d400d16d5bcfaa2f89b7c88
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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.
  • 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://dafemum.ru/aws?utm_term=want+to+know+my+horoscope+by+date+of+birth PDF link annotation
    • http://stroiline74.ru/70629271516dd6cx.pdfIn PDF document text
    • http://ximepamodoravun.iblogger.org/77817503075.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/ijuihja/bomber_friends_202_level.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/dgdhjpK/wamavifiroxelazu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/Wh8SjhY/musigokakatujowujawozorew.pdfIn PDF document text
    • http://damvglaz6.xyz/wallpaper_kobe_bryant_quotes0qlos.pdfIn PDF document text
    • http://presentinsta.online/18151022186hl4oq.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/b4CuTjf/robofiluzeduzasuve.pdfIn PDF document text
    • http://varuvoruva.iblogger.org/vokijedat.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/PghHgca/bsrm_steel_annual_report_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/jigdjif/toddler_plastic_swimming_pool_with_slide.pdfIn PDF document text
    • https://cdn.sqhk.co/zowuvutevak/Yig9Hhh/http_dgfood._teletalk._com._bd_application_form.pdfIn PDF document text
    • http://tularobumof.66ghz.com/lefimajakoxa.pdfIn PDF document text
    • http://circulyarkadigital.xyz/35202938269dsmp7.pdfIn PDF document text
    • http://procripton.com/watch_despicable_me_2_online_free_enz87wg.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/f0jcgfl/the_maxwell_hotel_seattle_parking.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_e78a165724b140b3b680a02cb14376c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e11df8-0eda-412a-9ac0-23335b09a535/2106964669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b736bdc-b271-4e0f-b4ad-670960570248/norakebesonutolodarowexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c471ef6f-dd49-4d75-9c3f-2436033a3c33/pimaxije.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_ca937bf0e2284acf96b1aa577f56cdfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd3213a-d417-4e22-a04f-a98eab79c062/how_to_write_a_general_statement_in_an_essay.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_1ffead418fe8480cb334b2d238c064ff.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_5ccf52313d6f4594b6b7dc42ee48038b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86c2db7-8390-40e1-a900-f6b7dd255dc4/kayla_workout_free_download.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_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 5772 bytes
SHA-256: 7c85454d1a3634d30255632fa4c5721423ec72cbdcc062b66525529d4f87e669
font_01_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 10788 bytes
SHA-256: 1300387596519fdff2c420d29c47454d5c05c06ceb46ecc16b75eb5983207a1b