Malicious PDF — malware analysis report

Static analysis result for SHA-256 325b23ea873d3b57…

MALICIOUS

PDF

81.7 KB Created: 2021-03-14 15:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 275804335863358e357bd44b42f1d694 SHA-1: 1486781de6321d2bf38f5fc82b1caaa1f66168fc SHA-256: 325b23ea873d3b576071afcd2b213482b3e855cb9f06445e9d3214295c79e1b2
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 0.9993

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/wix?keyword=hitchhiker%2527s+guide+to+the+galaxy+whale+quote PDF link annotation
    • https://cdn.sqhk.co/bokirebi/hgBgfjL/spiral_perm_before_and_after_medium_hair.pdfIn PDF document text
    • http://letnesil.xyz/fuberubh58l0.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/what_is_power_structure_of_society.pdfIn PDF document text
    • https://cdn.sqhk.co/medefitama/gdjaWjb/lidexized.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/jimuneluluto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd308602614a.pdfIn PDF document text
    • http://afracheat1.xyz/archer_hotel_napa_pet_policyj7ssv.pdfIn PDF document text
    • http://forpost-electrica.ru/jilonojupaserifojokejar1a48u.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/ehcjbRb/18814124114.pdfIn PDF document text
    • http://smotrikino.fun/98989027215ls396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_600c207c6718b.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/iAPjfjh/xajawazevasumukabeka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tinijev.epizy.com/hearthstone_tombs_of_terror_reno_guide.pdfIn PDF document text
    • http://gubadif.myartsonline.com/nikon_d40_lens_price_in_india.pdfIn PDF document text
    • http://bolomubimuga.rf.gd/dragon_age_2_isabela_rivalry_romance_guide.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/do_all_oral_b_heads_fit.pdfIn PDF document text
    • http://sugudilun.epizy.com/american_real_truck_simulator_apk.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_85e534d91a2f4256813380311d436aac.pdf?index=trueIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_4cf34d9858344036a5bc24beaefcfbba.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_ca7f53c9882f4c7d86ff7cdc511dc3c4.pdf?index=trueIn PDF document text
    • http://domuromu.atwebpages.com/romeo_and_juliet_act_1_scene_5_discussion_questions.pdfIn PDF document text
    • http://vixaxupofu.rf.gd/how_can_i_cancel_my_dish_service.pdfIn PDF document text
    • http://fenigubigona.epizy.com/36076864338.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_c83b03eb462a48c595e893237af21ab7.pdf?index=trueIn 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_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 5648 bytes
SHA-256: cdcf8cf9b00a7f84e7847e9af96cb6ee70db932f6bba775c987daec4e7042848
font_01_sfnt_off000110b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B9 11580 bytes
SHA-256: 394edf42d2d8c3aa9c614cc4e8718c120adbebbb774adaabb30f6d37ac19f0f2

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