Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28df87e9682cb58…

MALICIOUS

PDF

75.7 KB Created: 2021-04-17 15:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b268d2dac80b1e866cb0b9c47f3f7ec0 SHA-1: 127358994b7b633c60f3851833831dccefd24f8a SHA-256: d28df87e9682cb585cec4a8322435a56819db4823f1422aab8ee0f8850faa5ca
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://midufefew.ru/strik?utm_term=holster+sig+sauer+p226+ldc+tacops PDF link annotation
    • http://vixegoxufareka.getenjoyment.net/bible_study_on_the_blind_man.pdfIn PDF document text
    • http://parhelifrl.space/73086065086t4twf.pdfIn PDF document text
    • http://flathead.us/how_to_draw_a_face_for_beginners_anime397w1.pdfIn PDF document text
    • http://luminar4-download.xyz/stickman_spider_rope_hero_gangstar_crimeqent1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_603bba9f10e26.pdfIn PDF document text
    • http://apparentlyopt.com/samsung_series_5_5003_led_tv_392gcvf.pdfIn PDF document text
    • http://wopizup.mypressonline.com/list_of_bharat_ratna_award_winners_till_date.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/fuxazosivamurikax8ess.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5fdbea52afa89.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/dujakosisevi.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/nipukugaput.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/cells_alive_worksheet_answer_key_free.pdfIn PDF document text
    • https://powirubojeti.weebly.com/uploads/1/3/1/4/131482959/2e1ec57e.pdfIn PDF document text
    • http://wivupivipewezap.mygamesonline.org/32310739060.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/91ec26fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5fe86279620a8.pdfIn PDF document text
    • http://mavpa.fun/whirlpool_gold_stove_top_control_lockq33kw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramawotinejog.epizy.com/bhagavad_gita_chapter_2_sanskrit.pdfIn PDF document text
    • http://botizadis.rf.gd/amharic_bible_format.pdfIn PDF document text
    • http://zitejilid.epizy.com/american_standard_acculink_thermostat_error_code_126.pdfIn PDF document text
    • http://refowinevog.rf.gd/83201321247.pdfIn PDF document text
    • http://kolitaguligod.epizy.com/der_18._brumaire_des_louis_bonaparte.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_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 5488 bytes
SHA-256: baa4ffdc8ae5305def44b44a9f38977ca2fa99674458caeae2961c0a043db5fb
font_01_sfnt_off0000fb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2F 11472 bytes
SHA-256: f2aafce961bfb12ad441a2e91c6fcf7d0ff34846916f5873641b84720cde95d5

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