Malicious PDF — malware analysis report

Static analysis result for SHA-256 befdb9312cf7565a…

MALICIOUS

PDF

73.6 KB Created: 2021-05-13 05:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 918f09c22c096e591ab253789f9cf1b5 SHA-1: 51fa7e977d3ff1dfa504b5a1ce1bd73ccd1d767c SHA-256: befdb9312cf7565a1788b58de1d07bd4091f0b21350fe03443831f07a13e66a1
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-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://pelibifir.ru/strik?utm_term=kung+fu+tea+christmas PDF link annotation
    • http://losinglotterynumbers.com/how_to_fill_form_d_memorandum_of_marriage858cs.pdfIn PDF document text
    • http://5coupons.info/hansel_and_gretel_witch_hunters_2013_dual_audio_720pvkh0p.pdfIn PDF document text
    • http://gratoraama.website/16964315474p7e21.pdfIn PDF document text
    • http://housefashion.ru/vigitejojdi1d.pdfIn PDF document text
    • http://golosa-spasibo.ru/6272941652ztxpv.pdfIn PDF document text
    • http://rmk4sale.xyz/tugikopejuloe1uh9.pdfIn PDF document text
    • http://sberpodarok2020.online/bteup_result_2015_marksheet3h3a8.pdfIn PDF document text
    • http://pro-komp-master.website/sozixinapukzvtrp.pdfIn PDF document text
    • http://d-youtube.com/food_stamp_office_phone_number_please24nui.pdfIn PDF document text
    • http://testrun.ru/61747260696cuo9.pdfIn PDF document text
    • http://borutafag.66ghz.com/biggest_real_estate_crowdfunding_platforms.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/d9b575c4-6a07-4bac-b1b4-69413887fd76/4476597173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd70f64-f467-4c8d-8b0b-0ea433fe442c/do_while_loop_in_pseudocode.pdfIn PDF document text
    • http://xokeraje.rf.gd/23463977267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e874f36-9f89-450a-a4b1-13aa53c08d59/68263451954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29f03b2-b279-4dd6-909b-c9c696b59f34/58138659413.pdfIn PDF document text
    • http://xixoxamevat.epizy.com/logo_quiz_answers_level_175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6a754d-7ad6-4602-b91b-9dffd6979628/56433242563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47e048a-9e98-4c33-a30a-d9e5e950dd69/10543871233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e2f68bf-a48c-4e6a-954b-f9b688ce4017/what_is_the_healthiest_diet_lifestyle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c9b21d-62cf-45a5-b5a2-077d577d08ce/what_causes_little_water_bumps_on_skin.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_off0000dcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD9 5232 bytes
SHA-256: 77ed5c5beaa576268bffa69e413db96a5daba9439c6d10a09c55c6ff45db3b16
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 12420 bytes
SHA-256: aefd35966856be0a7fe3daf9920d573900fc0ba46eabef9f8b8b8efa11b7a483

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