Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4be9368a64d60bc…

MALICIOUS

PDF

77.0 KB Created: 2021-03-31 02:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a115ca4d8b003c7b60bfc591543174d0 SHA-1: 5054caeb17f463a48efc46d55cec499588f217ff SHA-256: e4be9368a64d60bc1c8b3494d03095b45479aa327e9f54eb4b30c3dc86f2b1ef
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 0.9992

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://midufefew.ru/strik?utm_term=how+to+draw+a+child PDF link annotation
    • https://garotilalu.weebly.com/uploads/1/3/0/7/130739336/jomekasuzawamuwofake.pdfIn PDF document text
    • https://tatefelerer.weebly.com/uploads/1/3/5/9/135966089/6137ec.pdfIn PDF document text
    • http://trenketo.buzz/46665752108x4r66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_601403599b42b.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/zodomivupuvi_retazuxe.pdfIn PDF document text
    • http://gta-msk.ru/37840369035b69vv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_6041a705ea06c.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/Kqhgiig/traffic_watch_ni_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/hcHudWO/63198665244.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/cgeggq0/tropical_forest_match_3_story.pdfIn PDF document text
    • http://whitetwo.space/the_leader_in_me_free_download2on26.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/5026266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5fcd6a0468a7a.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/7zhaK94/sneaker_king_uk.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/maxezivonipepumetafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5ff1bc31d7d1d.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/FdRaPji/crimsonland_hd_android.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/jilegarasepigew_saxejumixid.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/dba5dec7-934f-4fa3-9a75-94a046951c68/rosuderavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d791311-afd1-4dae-b20e-364727942a36/what_is_the_hidden_oracle_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a158dbf-37e3-4736-a6a0-523d55718632/the_secrets_we_keep_ending_explained.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/nicholas_sparks_latest_books_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036c5fbe-be4b-4734-9b15-594d3b28c099/linksys_router_ea4500_software.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_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 4900 bytes
SHA-256: 1bd34d5f18d682122c4b94dd7bb16fd2998da3d23dbd5e6ca621870dbc5925e1
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10388 bytes
SHA-256: 33d35481347755fd8366667640fe60f78bc9172b84fde91de7e449fdb95d70db

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