Malicious PDF — malware analysis report

Static analysis result for SHA-256 09880e5324776441…

MALICIOUS

PDF

76.6 KB Created: 2021-04-27 13:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 923dd6edfd1329bb2499ffcccf2dde85 SHA-1: 71f7e5f6d5a3b20b7e75e53324246a0b9ea93bb0 SHA-256: 09880e53247764419745a45aaedfd6a6245f6cf0353b0752023bf725c58e7cad
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://golowaki.ru/strik?utm_term=ucsd+mapped+index+lookup+tool PDF link annotation
    • https://dorixakogika.weebly.com/uploads/1/3/6/0/136051108/toboze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_606b4a1a3ca5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_6027dfe60337f.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/love_yourself_trumpet_solo_sheet_music.pdfIn PDF document text
    • https://rilulukopidu.weebly.com/uploads/1/3/5/3/135323077/5496897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_604ba37edfadb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_604492c1a5bea.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/23764305358.pdfIn PDF document text
    • http://nosukave.22web.org/industrial_instrumentation_books_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajipogijos.epizy.com/54595672656.pdfIn PDF document text
    • http://tinegupufijogun.epizy.com/how_to_pay_for_a_rental_car.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/year_three_maths_money_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/ponebexariwemudamiwazapur.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/my_hallelujah_belongs_to_you_song.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/58216105066.pdfIn PDF document text
    • http://gemiwojo.epizy.com/gojexowibifazopavaguzezu.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/pexovewezar.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/tizimituriposixidepipoko.pdfIn PDF document text
    • http://kogotiru.myartsonline.com/acids_salts_and_bases.pdfIn PDF document text
    • http://joduzot.rf.gd/animal_jam_play_wild_mod_apk_2019.pdfIn PDF document text
    • http://xegiseko.epizy.com/kenmore_sewing_machine_guide.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

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_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 5244 bytes
SHA-256: bae850e9084e244490e62b35d0f2fbc23843b5fc88fbfca2226727560455a606
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 11144 bytes
SHA-256: 1fd8bf833b99bbd51679a74a88415b441021c1a8ae9de444af9c39a47dd6bf2f

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