Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8989f54985c6ca…

MALICIOUS

PDF

72.4 KB Created: 2021-03-06 02:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b03a02f90e18925b19f3229e4918c69 SHA-1: 9058d5d3cf149560e41ee7f0d5b0c2fbe485c23a SHA-256: ab8989f54985c6cad535269b25768e5d41d09f9c4e7fc88dc0445f2ff8a05e54
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=ms+word+apk+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368485/normal_5fcdb8097cbcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5feb40465af19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_601a639a37c72.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/does_netflix_have_the_movie_the_secret_dare_to_dream.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_603175b764576.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/attack_on_titan_season_1_opening_lyrics.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/triangle_congruence_worksheet_answer_key_page_1.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/pakedapagenek.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/nursery_rhymes_lyrics_jack_and_jill.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/can_you_still_use_jawbone_up.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/fizuluwinud.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/d897d968-2337-40f7-830c-5d65cc0f4192/58537144033.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/cudahy_school_district_report_card.pdfIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_368745ccdd9a47b2af661df0f5820907.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d1fd30-4e1d-41e1-8fcb-1d2fba8476af/guwaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acea75e0-bf0f-4d67-a9cb-d4a054af2e6d/castle_sidewinder_3_programming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/icar_aieea_ug_admit_card_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd27d3d-b213-4d4f-8a53-2ec41dc7ad84/jemujavexatodajitoxo.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/sadugibela.pdfIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_b12a765725884715bd8a5af9e9c98717.pdf?index=trueIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/bulofisarozudarabosag.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/area_51_news_reporter_naruto.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/sunter_tower_fan_combo_40__13.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_off0000d5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 5164 bytes
SHA-256: 6ae5be7f7a19c688a895dd69b04c2e205e41ead71e199059094650b771956abb
font_01_sfnt_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 14564 bytes
SHA-256: a944fba700106e28e9e6f2304756c8d67470df967bd5fbc521bfc0850c0b7d14

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