Malicious PDF — malware analysis report

Static analysis result for SHA-256 909a34146835c16f…

MALICIOUS

PDF

80.3 KB Created: 2021-03-06 11:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd768686be5768c724fa128f812c1b88 SHA-1: 9660547434faeeabb5abbf6cc63550dcca620ec9 SHA-256: 909a34146835c16f9e9268fad98742d407ced88b5d012303d243e1e683b2b3a1
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 0.9964

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/aws?utm_term=munchkin+bottle+warmer+parts PDF link annotation
    • http://kunujunekedi.mygamesonline.org/87317888709.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/62660911268.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/kinavofawamuvowesuw.pdfIn PDF document text
    • http://lipoviwevaja.iblogger.org/vocabulary_workshop_level_c_unit_6_synonyms.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/taotao_50cc_scooter_maintenance.pdfIn PDF document text
    • http://callup.today/10179846584rpmod.pdfIn PDF document text
    • http://verifybadgesbusiness.com/raypak_rp2100_service_manualcvein.pdfIn PDF document text
    • http://lovelyhouse.online/dadowiguganulipuzosnst5v.pdfIn PDF document text
    • http://morpeoplelife.ru/havoc_brothers_audio_song_freel9psh.pdfIn PDF document text
    • http://termometr-medikal.site/92076565026lwin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/apple_computer_cheat_sheet.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/how_to_fill_self_appraisal_form_for_kvpy.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/96739030647.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/ledger_microsoft_access_template.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/gubase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7391206-c39b-45a0-bf3b-6bd5e0ab4875/4180853793.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/denon_avr_x4100w_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2263947-b98b-4c6f-a77b-b3b6237eff5e/biwivavorogasudamijak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07772e49-d1ca-43fa-9006-eab08bd4f57c/what_is_computer_math_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e6714b-7769-4e0b-b2dd-7e9beead464b/50079753717.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/suwodojerawekim.pdfIn PDF document text
    • http://lojosikol.epizy.com/70929768154.pdfIn PDF document text
    • http://kimamewaseziwal.epizy.com/first_alert_radon_test_kit_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e42713-980e-43c1-8e67-653ec273151c/kurufovifanefexaruvebi.pdfIn PDF document text
    • http://pexomesukifek.epizy.com/33951590952.pdfIn PDF document text
    • http://xasazotim.rf.gd/37952410706.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/17299233971.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_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 5472 bytes
SHA-256: 0a47b81dd3453bd3fb293febc945fee8210d059ea5d105bb54c0c68c7461ae60
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 12640 bytes
SHA-256: 20061be38ce412c0363e032d49179f78b9287a14f8d6babcb2a584c5d257217d

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