Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bb00976544b183…

MALICIOUS

PDF

107.5 KB Created: 2021-03-23 22:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6798ebda0eab83838fa267768e560088 SHA-1: 5bf9218b250527c607425be21bda530f983b7d3d SHA-256: 69bb00976544b183361c0b58fbfa82cadd821bc18ca151b2f7d8ded541ae707e
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 0.9995

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://kuzutuzo.ru/123?utm_term=cashmere+cat+miss+you+music PDF link annotation
    • http://pinopizo.sportsontheweb.net/94325736561.pdfIn PDF document text
    • https://moxisubisoxotap.weebly.com/uploads/1/3/4/8/134893280/nekuvinegaxavam.pdfIn PDF document text
    • http://janusadow.mygamesonline.org/poniraroxafu.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/marketing_strategy_executive_summary_template.pdfIn PDF document text
    • http://totipuzuforaz.mywebcommunity.org/tebadase.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/how_to_pass_well_ap_exam.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/zosikowolixiluxux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422659/normal_605021d298063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_6022c53a9db5f.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/ihiigdX/thank_you_teacher_quotes_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_6049bb65af6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_604a5ccb3bb8e.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/22743998708.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/OhhhoKS/ben_graham_security_analysis.pdfIn PDF document text
    • https://siduwibe.weebly.com/uploads/1/3/4/7/134775996/2224359.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/naxozelozude/deloitte_email_address_format_uk.pdfIn PDF document text
    • http://tirigofov.atwebpages.com/mejefiwisurikoge.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/20632974645.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/simamagovuxuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/23475613802.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/roadmaster_granite_peak_womens_bike_price.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/vlookup_all_formula.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00015098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15098 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off00016112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16112 5016 bytes
SHA-256: 492df147df34d21b5bf37505dfeaa4d2863f1b818ddde5f07047f9dfc9e10902
font_02_sfnt_off000171f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171F8 13480 bytes
SHA-256: e71e754c8a8d5ccab09e31542330fc84f65c9b5df9451fb7335bd92568c9cd52

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