Malicious PDF — malware analysis report

Static analysis result for SHA-256 3468e12492988b3d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-05 05:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ded86e1f43018e1c7e9338166ead26f8 SHA-1: 06ba3fdc37f055946a5b7b9df5013eb04ee1285f SHA-256: 3468e12492988b3d0fa3db7069c08045a7d71db17d712fe0ad947334f6e68b05
126 Risk Score

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 0.9998

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://fokemale.ru/award?keyword=free+osha+safety+classes+online PDF link annotation
    • http://bajexubazewa.iblogger.org/is_hamilton_beach_a_good_toaster_oven.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/95402501299.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/walmart_relion_confirm_meter.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/how_to_do_business_without_money.pdfIn PDF document text
    • http://devgame.design/122569887975ivpl.pdfIn PDF document text
    • http://wildboost.club/dictionary_of_archaeologyq9h4i.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/wisodopagukatepapel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/qsc_rmx_2450a_specs.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_0d34f735399b4e1280de218dcf20ebe3.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_d50e867fdb3f4147a9d7843609ccc30f.pdf?index=trueIn PDF document text
    • http://fixadamobus.epizy.com/weather_report_harstad_norway.pdfIn PDF document text
    • http://roradom.epizy.com/sunsetter_awning_cover_installation.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/how_to_disassemble_cast_iron_pipe_joint.pdfIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/learn_korean_audiobook_free_download.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_642de5b0647549bc9918c0506d71fd2f.pdf?index=trueIn PDF document text
    • http://teluroluxeterez.myartsonline.com/software_testing_course_fees_in_seed_infotech_pune.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_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 5028 bytes
SHA-256: 38894663b54da56f53697adab7ae2bd7d6ede9baf03ee986136497e247dac3fe
font_01_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 10648 bytes
SHA-256: 56e25dfa063a324e7f63e0bf1e942acf3541b90f3f79a75db9ef61b1dfa05de9