Malicious PDF — malware analysis report

Static analysis result for SHA-256 1053a0dbd99af00f…

MALICIOUS

PDF

77.1 KB Created: 2021-05-06 17:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 07906af67dcec30ab59225d80be89d35 SHA-1: 52cd3407f2e7c067f283eabef91ffca168f65a82 SHA-256: 1053a0dbd99af00ff81021a7a95e0dc8ce488093b4caa413eec432a5aaad4d2b
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://bologen.ru/strik?utm_term=cen+tech+multimeter PDF link annotation
    • http://reliables.ru/wepekojozovozunuviponewufdvrr.pdfIn PDF document text
    • http://slmit.space/2169043070nuq9f.pdfIn PDF document text
    • http://future-techno.ru/jai_shree_ram_song_dj_mix_2017_mp3_downloadqwwu6.pdfIn PDF document text
    • http://sikazigazes.mypressonline.com/learn_english_grammar_in_gujarati.pdfIn PDF document text
    • http://carishr.com/66105231326fqet8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485299/normal_605271c01c0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/bhhjawn/61458042889.pdfIn PDF document text
    • http://normal-id.com/appium_java_client_jar_6._1._0k4av0.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/ehfjahd/37566629864.pdfIn PDF document text
    • http://mifvideo.space/gta_5_cheats_cell_phone_numbers4rm57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6066cc0185538.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/different_types_of_alcoholic_beverages.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/jijjdjh/xorobuzagisazavonidiruzi.pdfIn PDF document text
    • http://trelon.fun/naxizuzexabipojupiser7ez6n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415543/normal_5feaf2952b067.pdfIn PDF document text
    • http://kwini-fini.online/zarubuzedizubumuxivuvenipu1fq0.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/qicjea2/tips_dead_by_daylight_walkthrough_guide.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/biomagnetismo_enfermedades.pdfIn PDF document text
    • http://teguruta.medianewsonline.com/analytical_skills_syllabus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/tugej.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/antibody_engineering.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_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 4556 bytes
SHA-256: 296e168b8b5c74ce3ab1e9341ef6c5fd4ba5377b954e4be2a5d264889ed43ea7
font_01_sfnt_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 12140 bytes
SHA-256: 74f237a499f7b340b2c21557fe94509126ca6eeb04d0880ac7a46bdb4b843e46

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