Malicious PDF — malware analysis report

Static analysis result for SHA-256 085311117e675266…

MALICIOUS

PDF

76.2 KB Created: 2021-04-16 22:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2e5d9cb86c12955a64f138f7f00f556 SHA-1: 9cc56281c02127ddf39608b98d1bd5cc1f04d0af SHA-256: 085311117e67526605883df807e58f993fbca293f446be4e7624e81c91ccf811
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 0.9997

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://crophysi.ru/strik?utm_term=skyworth+tv+problem PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402964/normal_606e98481f697.pdfIn PDF document text
    • https://cdn.sqhk.co/lafugafeniki/sibGicW/31857359892.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/list_of_words_with_antonyms_and_synonyms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392453/normal_5fca597db2f16.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/jbvif4d/my_walmart_money_card_routing_and_account_number.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/sc_boat_bill_of_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5fd275373fa8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_6060426e1dcae.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/53628320307.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/gijLTXn/3116521462.pdfIn PDF document text
    • http://finonit.mypressonline.com/grammar_test_a2.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/138c98ed-0fb7-46c2-ae29-f253063ec18e/2004_lexus_es330_headlight_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/moon_river_piano_sheet_music_easy_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/how_to_get_a_chick_fil_a_scholarship.pdfIn PDF document text
    • http://gezixus.myartsonline.com/21355071510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246957a6-78b1-4309-a315-ad72330e1799/how_to_repair_my_panasonic_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/nejazegixasupefulutofelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f910ef5-8159-4937-b9b2-1523f98504b4/fimikugikawexuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c7b694-64e0-40e3-9c85-253cacae7eaf/95634513146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6249cb-3ea5-4120-9c86-af952c451b4e/zitiwolavasaxonopotav.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_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 5232 bytes
SHA-256: 52e20ac39c1ad95795035a40599cb379c74233cc31614213a97823190afc6d0d
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 11200 bytes
SHA-256: 67c489efac284a50ca6184942695585eaac895d16d4004587e77adc40dce2c07

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