Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84155bdb38ff4e0…

MALICIOUS

PDF

74.7 KB Created: 2021-06-04 06:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3253114c84e655492239f0bb69217178 SHA-1: 11f919672ec3d699d7161da645bcd885888af5e2 SHA-256: e84155bdb38ff4e018321316eb344c2d3899544b791dbd9e5c3c96c3ccc236c6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://catamma.ru/pbw?utm_term=main+hoon+na+movie+online+youtube PDF link annotation
    • https://jodawebodo.weebly.com/uploads/1/3/4/6/134634345/9f05d7c3066f2d.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/virigafo_xijulelitet_xexeti.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/cf07a2ea-91f0-486d-a3d5-4335fd1a9aa5/comma_exercises_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0d0aa6-9eaf-4e13-9e4e-0a9a80be65e9/nigit.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144417882/chakli_recipe_in_marathi_archana_rasoi.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/f/zoriwewisivodiveki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea2e5f4-d9c3-4f8a-ad59-254cc5b2c140/repair_scooter_near_me.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/f/jay_gatsby_fear_of_swimming_pools.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/athlean_x_home_workout_free.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/f/22014437001.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/66426575662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c26822-afaa-497f-a885-3b2b30e40535/how_old_is_a_dell_latitude_e6510.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144557511/o_que__movimento_circular_uniforme_acelerado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ac8e70-04ca-4207-aed9-02e59da69957/kahlil_gibran_il_profeta_lamore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9470aec8-8c33-4221-8039-1534bc3c82b7/what_does_it_mean_when_my_dryer_wont_turn_on.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144445560/lenovo_tab_3_update_android_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1aefd3-9984-4ccb-86f5-85860dc845aa/maytag_quiet_series_100_user_guide.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/69928142092.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/70395082277.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 4956 bytes
SHA-256: 68277b2d3ffae9ff847b6feab817e83cefe908a57d82ba3376b151bd83b0512f
font_01_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 11004 bytes
SHA-256: 4abe50b006ff801e3629d2f3df4ebe7d1666b16002d6958ffc9f19558317e614

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