Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86db6b3f707bd4b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-21 01:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1bc6da401487ae99a56aa699021bee15 SHA-1: 5b037da8f157629942eecce8ac727ad728d6d749 SHA-256: f86db6b3f707bd4b8f3c6fa35ad6816f4cf7e4968f25be6292eff960d207e166
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://leonvi.ru/strik?utm_term=first+aid+training+schedule+2021 PDF link annotation
    • http://zixudivibudizu.scienceontheweb.net/what_are_your_3_body_paragraphs.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/3888699975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60267bb96dd0a.pdfIn PDF document text
    • http://ru-dev.xyz/hurrian_hymn_no_6_sheet_musicvq4j7.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/best_ebook_download_sites.pdfIn PDF document text
    • http://starconflict-game.ru/xejuforukalimojunibij2xvyg.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/feudalismo_capitalismo_y_socialismo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_604564230bba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_601b3111d963d.pdfIn PDF document text
    • https://xizuzesujebowu.weebly.com/uploads/1/3/4/6/134666185/7f798.pdfIn PDF document text
    • http://hookup671.site/mebujuwefironovefuwogeg7d2ln.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/thomas_the_maze_runner_movie_cast.pdfIn PDF document text
    • https://sorunamupojiwek.weebly.com/uploads/1/3/1/4/131407183/357842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479938/normal_5ff65acfd435e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_d1d5b321e21d49348b6f255f9a948404.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_f02dfb03ddae43b2afcb6cc003ac67bc.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/vavawotuzujakajenemam.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/xajejamudojajikivibaf.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/26508990901.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_3e91a5b5db4341dcb472cf7ad97b3c93.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 5480 bytes
SHA-256: b45d45419ac7f7e635bd053abe91ecc3e2e4bfaf28c8f0ea5e052cc62ae2540b
font_01_sfnt_off00010067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 10640 bytes
SHA-256: 64fa92b748fac6e035997cc107e12f50c5655d3868ff2b2af440d7af848b501c

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