Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de7a977f76c0ec9…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 05:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a6f0a927a3c9ad5246786ecc1354936 SHA-1: 9ed13db3533257b57b1a8383f9c2f76fb1c3a88e SHA-256: 6de7a977f76c0ec96b16b2b3b62930cbb868bf0257ed61cd9128f6debfd9bc64
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 0.9998

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://jottigo.ru/strik?utm_term=echo+blower+won%2527t+run+at+full+throttle PDF link annotation
    • http://wigageturuv.mywebcommunity.org/sijida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60298a72cdbf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5fdfdb6ea3bda.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/affordable_housing_application_nyc.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/human_circulatory_system_diagram.pdfIn PDF document text
    • http://rawitotizoxuk.scienceontheweb.net/91516303555.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/tricare_south_region_referral.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/storm_of_swords_hardcover_edition.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/jatujoxaxulufi.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/5957952283.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/konuvukeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_09e68a8c0ec248fe81e144c9dd2b7884.pdf?index=trueIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/wireless-n_wifi_repeater_mt02_manual.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_419f06b4a3464a588cb88383411cb163.pdf?index=trueIn PDF document text
    • http://biwosagamivi.myartsonline.com/12th_grade_spelling_words.pdfIn PDF document text
    • http://dawejur.atwebpages.com/arthroplasty_journal.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/metso_jaw_crusher_c106.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_f4bd9e5d15e948ff9f8bb0a044faab3c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 4848 bytes
SHA-256: 6a1d005ff4ad0045419f6dd83cda6fb2dde068086d5252a2cc56e7c18a0cd868
font_01_sfnt_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 11168 bytes
SHA-256: f37e2c3885c478cc967738f6aba45b92457b7a2453a9c9b69d35bfde8d30bd81
font_02_sfnt_off00012983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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