Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be13fbd564b51cf…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 05:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c33a750c4ae5116ddcc318ef04ddf53c SHA-1: 5703e1a4ca6601a7c728eb7c071af06f16a321e5 SHA-256: 6be13fbd564b51cf801712632ca3faa817520c8a44afa30ed749f360c9efc6a4
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-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://xajibur.ru/award?keyword=ielts+speaking+topics+2020+may+to+august+pdf PDF link annotation
    • http://immorta-cross1.club/party_city_birthday_balloons_pricesi8a39.pdfIn PDF document text
    • https://cdn.sqhk.co/nadovexum/2oijpN2/vuranofowa.pdfIn PDF document text
    • http://lastmarkt.ru/dudorapazuzoresemikodudolla8cm.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hkgfics/pelevuzelub.pdfIn PDF document text
    • http://montana-media.com/8500299008173qvx.pdfIn PDF document text
    • http://proita.fun/food_safety_during_pregnancynlpcu.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/comparative_form_of_adjectives_and_adverbs_exercises.pdfIn PDF document text
    • http://policyhelpcenter.com/rezamanelilanavakexigpxdsf.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/gasezenawuvopazemanajodeybohm.pdfIn PDF document text
    • http://excschool.ru/cmc_markets_plc_annual_report_2018t26wo.pdfIn PDF document text
    • https://fefokepixax.weebly.com/uploads/1/3/1/4/131452923/e2abae3e26ad08a.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/hcjbvhh/60652056149.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/2522475.pdfIn PDF document text
    • http://neyroskakalka.site/deklination_zwei_adjektive_ohne_artikelc9eqt.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/ejdMeG4/mededivogopejox.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/ranogav.pdfIn PDF document text
    • http://anyita.space/mawabugavfpbe.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/jiunhjJ/barriers_to_entry_definition.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/moultrie_a-5_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5756 bytes
SHA-256: 5af9141c16dddb6a7bdc47a099a970512c144cff5496cf7834426a765ac10153
font_01_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 10892 bytes
SHA-256: 312d43200532c9aee60a721725a4149fb015fc491e769f7c969c94d92833043e
font_02_sfnt_off00012203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12203 16148 bytes
SHA-256: 64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b

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