Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d889b4a986dbf47…

MALICIOUS

PDF

67.6 KB Created: 2021-05-09 12:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 785cfe0679030ac53c5239304df60576 SHA-1: 5286cbc091584c261f353e8fc8d3af972091866f SHA-256: 2d889b4a986dbf47fdc9cab0b27899c66292cb5940b8a15fb5bad0aa8ef5dd94
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 0.9998

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://seumenha.ru/strik?utm_term=side+by+side+student+book+1+third+edition+pdf PDF link annotation
    • http://tupaxeguna.scienceontheweb.net/how_to_access_my_cloud_mirror.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/boy_erased_livro_portugues_download.pdfIn PDF document text
    • https://tuduzijusesuzi.weebly.com/uploads/1/3/1/4/131406801/soxodu_xowojuka_xovokevasuto.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/bemomelosajiwoxugoneb.pdfIn PDF document text
    • http://bagutoruramig.mywebcommunity.org/wonuzekaboweka.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/DR1Dxgd/small_tool_boxes_at_home_depot.pdfIn PDF document text
    • https://gunuxaruta.weebly.com/uploads/1/3/4/5/134588955/6a60e672720db1.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/DP3jbjf/39666901409.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/zomokatak.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/gBSgdui/karirop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supinam.rf.gd/epidemiologia_teoria_e_prtica_download.pdfIn PDF document text
    • http://bewegemoketofa.rf.gd/current_weather_report_in_west_bengal.pdfIn PDF document text
    • http://nirutavikuda.epizy.com/4718995416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3503d46d-1b6e-44bd-b14e-fa5bafbed911/what_is_the_biggest_threat_to_climate_change.pdfIn PDF document text
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_5e5b3f4d6e2644b887d02c2a64967c04.pdf?index=trueIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_f5646b4bcae646ad8038f0fcebc300f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d3ad9a-2dc1-44dd-ab18-ea373195ffbe/mini_cooper_s_brake_pad_reset.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_b07ac19f39214cd1b13ff48f2dfd260d.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_795e5e984a9e430b987e1a17cc7a3301.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_off0000cae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE8 5348 bytes
SHA-256: 7d8c78d4fbf1eb6120329b45f7129ecfd1d437db8bb85f65acde5d9e85c77068
font_01_sfnt_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 10456 bytes
SHA-256: c1d76a340ebc709e60577e83800a373d9d0248c55fda2ac707fccad5e8225622

Open this report in the interactive analyzer, or submit your own file for analysis.