Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b06017305978f7…

MALICIOUS

PDF

61.9 KB Created: 2021-02-20 01:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 713a5d21f5d99f64191c010ac05a8897 SHA-1: e0c8f78a2dbc7befa981c5454dfa36cc747dfdc0 SHA-256: 33b06017305978f7d5dc199e3dc2361e86e747167a175ee35856026f21baf050
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 0.9996

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://seumenha.ru/strik?utm_term=mcgraw+hill+4th+grade+math+book+online PDF link annotation
    • https://cdn.sqhk.co/xorilulog/Kidc1ji/bomeso.pdfIn PDF document text
    • http://wide-do.top/adventure_of_tintin_dual_audio_720pincyi.pdfIn PDF document text
    • http://wonder-ita.fun/mystic_messenger_zen_route_text_guidec8fby.pdfIn PDF document text
    • http://runmasten.online/oster_food_steamer_4711_manualny5db.pdfIn PDF document text
    • http://hookup153.fun/gekelc06r0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_5fe934c0a5a2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://reluwiz.epizy.com/85256011916.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/motorola_bootloader_unlock_tool.pdfIn PDF document text
    • http://tumeminurel.rf.gd/13656210750.pdfIn PDF document text
    • http://kigizeme.epizy.com/first_grade_english_worksheets_free_printables.pdfIn PDF document text
    • http://pebotavafusu.epizy.com/couples_retreat_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/hungry_shark_evolution_cheat_2018_apk.pdfIn PDF document text
    • http://lofoxos.epizy.com/4653890617.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/70517806672.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_off0000b65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65B 5564 bytes
SHA-256: 7310a7605cc365b6c3240879de978d067b0d38c691577b755de1f1f633c3f3c7
font_01_sfnt_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 9860 bytes
SHA-256: d7d33974791e929c0cbade45b8ef2adbbb3e7d92d11edce1848357c78cdef0bf

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