Malicious PDF — malware analysis report

Static analysis result for SHA-256 91753cb3c331f4a4…

MALICIOUS

PDF

75.4 KB Created: 2021-03-11 19:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 095b6a2571cdbedb3857ea8892b0be06 SHA-1: bdbbade6a5b947e5fcab9951566226cd8984146c SHA-256: 91753cb3c331f4a4b5f7ce642535f4ee91dd5d1063979f4cb5a61ea85ebcd1ad
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 0.9997

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://fokemale.ru/123?utm_term=poster+template+latex PDF link annotation
    • http://peluxuba.sportsontheweb.net/netgear_n300_review_extender.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_6029858d9fe74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451023/normal_5feaf98a76ea4.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/jonozugexubemo.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/how_do_i_know_if_my_cpap_humidifier_is_working.pdfIn PDF document text
    • http://lodexigu.22web.org/cardiomegalia_global.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/phdiiha/knife_scrape_sound_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/RRrPCyw/1054661159.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/hf0YN86/anatomy_of_hell_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/jghcFUK/goal_translation_english_to_french.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/fajorojami.pdfIn PDF document text
    • http://vowubomirasupem.22web.org/xijitowarumijib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_601a195241d3e.pdfIn 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/f993236c-7766-4fe8-bc49-a0c18e0c8c61/dutafaxixoxal.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_d58eb5bb2c254191a8cc8ffe81b26b46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/141380c5-39ae-44fa-acd2-06d3beefb3d2/clear_speech_speaker_for_sale.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_2471cafeebae4bfb9b1c7683a9d30ebd.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_dfd661c3ad5744ad83c57a12742b8e39.pdf?index=trueIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_ed87b0429e1540ccb539be7b10abe558.pdf?index=trueIn PDF document text
    • http://fijopad.rf.gd/best_manual_tile_cutter_2020.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_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 5032 bytes
SHA-256: ff95a8bdca43116f2f0eb82548041474ab4c5397ea8381bea3e3ac62e25c3dd5
font_01_sfnt_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 13364 bytes
SHA-256: 9523c6627a587267dc7c444c3324434a7ab4c187db5c5020cd77306f0a3b0f06

Open this report in the interactive analyzer, or submit your own file for analysis.