Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc71da37f94f8d6f…

MALICIOUS

PDF

77.8 KB Created: 2021-04-10 20:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af255e34eb848c5908c42376175b1556 SHA-1: 529f1e05cc6d92dfb8abdb10bbf059a03cab1d5d SHA-256: bc71da37f94f8d6fa812aad1b62324ca9ffa876001c867d2f43138e68c36973d
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 0.9998

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://golowaki.ru/strik?utm_term=samsung+dw80f600uts+won%2527t+turn+on PDF link annotation
    • http://wamimexololiwam.iblogger.org/keduxetuxu.pdfIn PDF document text
    • http://bujufamamaw.22web.org/skew_symmetric_matrix_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_605912f7abdbb.pdfIn PDF document text
    • http://zijogodakenanaf.22web.org/62193677563.pdfIn PDF document text
    • http://leafester.online/algebraic_expressions_worksheets_6th_gradexbmmy.pdfIn PDF document text
    • http://noxesim.iblogger.org/jafixelaliravitagipekupen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5ffce1bc195cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_603a83cf3c65b.pdfIn PDF document text
    • http://moitender.org/kopavutejarx1fgi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405414/normal_6005e8b6e961c.pdfIn PDF document text
    • http://xelinuruziv.iblogger.org/palemajasiwisokaxiweju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetixeguxiji.epizy.com/46873837390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944ec39d-622c-4731-a334-e1b21a1ed89f/lease_agreement_termination_notice_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0602dabf-2f59-4ca0-862f-da9792e957aa/lush_essential_oils_handbook.pdfIn PDF document text
    • http://weloridotam.epizy.com/economist_may_2020.pdfIn PDF document text
    • http://nigugolesaxof.rf.gd/pawovuwudoka.pdfIn PDF document text
    • http://boludit.rf.gd/487048447.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/andersenove_bajke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52628d10-8d7f-4d76-8a0f-652ec6d5e8b5/murray_snowblower_parts_near_me.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_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 5916 bytes
SHA-256: 1fef562ac0ad03d365e63dc41918a4b6745854a3b5df52c46dc838a4952bc7ad
font_01_sfnt_off000105ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 10656 bytes
SHA-256: 263cb1590fdd291694ac05607099293bf386e348b465a99aa08d8bc0a9e09313

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