Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2567e00508771d…

MALICIOUS

PDF

75.2 KB Created: 2021-04-17 12:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2fec0fd6768c2714e25e3126f1087aa7 SHA-1: c40263f9035ec1fb2375f2b278417910375dcb4d SHA-256: 3d2567e00508771d92bfdf7fd32ab92437a0c486ff7219ea9d737a80c0a183b2
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 0.9996

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://soxebez.ru/strik?utm_term=data+science+degree+online+usa PDF link annotation
    • http://zuzutogutid.22web.org/great_are_you_lord_chords_key_of_d.pdfIn PDF document text
    • https://cdn.sqhk.co/sixatowitur/Bw71jhv/dunarorajegoger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd68a3c57538.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/lowofazezomap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_6047a67dd7c3c.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/Byifjjj/bluffton_university_women_s_basketball_division.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/introduction_to_finite_element_analysis_using_solidworks_simulation_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/giHFNhe/lenovo_laptops_yoga_920.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/pdf_file_resize_less_than_200kb.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/XbhjjMV/commander_battle_hack_mod_apk.pdfIn PDF document text
    • http://tanifulumu.iblogger.org/girakunigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cc113ede-31a8-4e16-a485-767e84b26e28/96057796049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1132a7d-123c-483a-9f34-6d8660e1ccb2/amoeba_sisters_video_recap_photosynthesis_and_cellular_respiration_comparison_worksheet_answers.pdfIn PDF document text
    • http://nokubivuva.rf.gd/pasar_de_a_word_descarga_gratis.pdfIn PDF document text
    • http://fivomasabod.rf.gd/zogaxoxezagexuwidajego.pdfIn PDF document text
    • http://josamex.epizy.com/83718329917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b62fff-de89-41a0-a07e-830024ab2c3d/how_to_reset_waste_ink_pad_counter_epson_l120.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/vertex_astrologia.pdfIn PDF document text
    • http://wegorabeg.atwebpages.com/subebafipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90882639-de78-47cc-b870-704df56df26f/tejozekumorekalal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 4988 bytes
SHA-256: 09a2d692d55d499e8c852704842907dcc008e93966e34b9a8967682ae93f68ba
font_01_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 10180 bytes
SHA-256: d3881fe60e0613009026d9e23309218622162a18df26a54728b081fbee13be07
font_02_sfnt_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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