Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa878c66cda2b104…

MALICIOUS

PDF

111.8 KB Created: 2021-03-09 06:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 690e86e32c9020a2377779b163c9f0e5 SHA-1: 9ff141f8ce29c59928ab096c7e961feada402539 SHA-256: aa878c66cda2b1044c29477737fa170598ed4fd3975fb030653faa789ee5bdf4
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 0.9995

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://leonvi.ru/award?keyword=2+week+metabolism+diet+pdf PDF link annotation
    • http://samafutanub.mypressonline.com/avantage_comparatif_et_absolu.pdfIn PDF document text
    • http://minuette.me/duracell_aaaa_datasheet7g7t3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5ff3dd431d665.pdfIn PDF document text
    • http://hookup154.space/needful_things_antiques_mall_bedford_vau6lnl.pdfIn PDF document text
    • http://wowitaly.space/frederick_municipal_forest_off-road_trailyxj4e.pdfIn PDF document text
    • http://sks-expertiza.ru/diff_between_automation_testing_and_manual_testingefhsz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487432/normal_5fdc05da47be6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fcd371e2a747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5fda6e28ae968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_60403c03ef8e7.pdfIn PDF document text
    • http://parkji5x.xyz/why_does_my_dyson_ball_filter_keep_popping_out7y3nt.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/1c882c64-9a3c-4f9c-afbd-397dc17517e6/mumilaveniferivigabora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e64f4f-f9ea-4412-b950-ab1862163f3a/berserk_volume_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840eb965-7e8e-4781-b0f8-ec0a8f71d7ec/jafobezebafujosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a5846c-64d7-48a6-85f9-a71c6c85b70c/oreilly__python_for_data_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbc7c46-13d6-4533-a5b9-74a1b97942dc/canteen_boy_alec_baldwin.pdfIn PDF document text
    • http://girofili.myartsonline.com/the_way_we_live_now_susan_sontag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e08f550-4f9e-47a7-adfe-e3f5e1e228a9/emotional_intelligence_2.0_test_code_kindle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cce9cde-dc88-42a7-aa07-f363a2831094/much_ado_about_nothing_act_3_scene_2_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea47aa0-a7bb-42a0-b498-0fc5b28df432/complications_a_surgeons_notes_on_an_imperfect_science_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3cddd8d-e94c-4b7e-a592-6eba016a0f72/dymo_labelwriter_4xl_driver.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/minn_kota_riptide_terrova_80-lb._i-pilot_trolling_motor_24v.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_off00016e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E06 5424 bytes
SHA-256: 410d7369751a4b40b4984f9d383f5964d4a447ea21513f190629ecf445950be2
font_01_sfnt_off00018077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18077 15812 bytes
SHA-256: a3547b627e9faa3fcb396d2f478375e3145df691f16529b6c7271a4919dc8086

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