Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e74c7a0b538be1f…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 04:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 08503c3da729f2384bebb3525508f358 SHA-1: 1168aa1ee6567f87d8c0fde1b69623583ad1beb9 SHA-256: 2e74c7a0b538be1fd6cf8fb1618179409effccefca883c501ff1e080c0fbd8e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=metabolic+disorders+book+pdf PDF link annotation
    • http://digosige.mywebcommunity.org/neopost_is300_series_franking_machine.pdfIn PDF document text
    • http://sberbank.services/sample_autopsy_report_template07g1j.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/pdf_magazine_reader_online.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/5th_bipartite_settlement_of_bank_employees.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_60546b0567d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fd38ef54ed8a.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/93325319412.pdfIn PDF document text
    • http://appeal-ig.com/11360711302xjhf7.pdfIn PDF document text
    • http://leoidet.xyz/bodagilutobitab6pejp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_6042edead852d.pdfIn PDF document text
    • http://rollernefritmassage.xyz/is_the_raf_a_good_careernmbm5.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/description_of_people_s_physical_appearance_exercises.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/lyman_turret_reloading_press_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipokeviti.atwebpages.com/95368359343.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/sasavijorisuzufesi.pdfIn PDF document text
    • http://wolidile.rf.gd/android_studio_3._5_avd_manager_missing.pdfIn PDF document text
    • http://fivosuregimafeb.rf.gd/nukoxiripaguseradufid.pdfIn PDF document text
    • http://vomalowo.epizy.com/iso_9001_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/does_dish_voice_remote_require_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/28255969700.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 5360 bytes
SHA-256: 322422516bd52d1e3bb00f31d7e528660caf512adb4ad44a1ba44a5d16abe0e3
font_01_sfnt_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 10272 bytes
SHA-256: 462267c355e9bf6c89b3518390f8832ea047b764ad85f25528e0ae9dedb8d21e
font_02_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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