Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1af9e5ab59b792c…

MALICIOUS

PDF

132.0 KB Created: 2021-05-02 11:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2613bbef6977058c2cd4866311b461ae SHA-1: 85542ac3a040f980c9059be55804f9a529a7c24d SHA-256: c1af9e5ab59b792cd97c62dd67406f61c51bb72db79ea58acb1d2be90dc63b27
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 0.9983

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://soxebez.ru/strik?utm_term=shadow+running+meme PDF link annotation
    • http://lightstart.xyz/juwavazibee02xm.pdfIn PDF document text
    • http://trysoda.pro/fajodafesodokimkx9do.pdfIn PDF document text
    • http://disconto50.info/gofawofogu5jml0.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/bonoxewd36zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_603c04918742b.pdfIn PDF document text
    • http://bonus332.site/laziness_in_the_bibleci5al.pdfIn PDF document text
    • http://liketime.online/grundig_s450dlx_wont_turn_onsbldp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_5ff0c3a334184.pdfIn PDF document text
    • http://medtechnika1.ru/58061920562ozr5f.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/xixekabusaf.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/is_python_enough_for_machine_learning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446761/normal_603bb9ea00a27.pdfIn PDF document text
    • http://igcopyrightverify.com/901031911408q64k.pdfIn PDF document text
    • http://organic100.fun/dosajanujirumubasw0el6.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://s3.amazonaws.com/pusolefosex/23491346388.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/mubudanibovogepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9717766-7f2d-4bd1-a5a5-11e0a48e4c3a/springfield_indoor_outdoor_thermometer_manual.pdfIn PDF document text
    • http://dapibudajemuk.atwebpages.com/walden_thoreau_english.pdfIn PDF document text
    • http://sufixis.myartsonline.com/54747293939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40883e71-bae8-4b1e-a292-df6928fa70a1/gafupo.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/tanibemeloto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4789fe87-4e97-49b6-bd7d-45cc6ad00b2b/feliz_navidad_piano_chords_and_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df51d547-df30-4cce-accb-7a61709eca7d/94757855969.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD53 5024 bytes
SHA-256: 3df9a3b5e96e31fd690f8f3e84ba51352f4a862e1f8e6bb8811aa78d46dec826
font_01_sfnt_off0001ce37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE37 11516 bytes
SHA-256: e800e8e7503b67fbb31b02327269bfd3aab1931a84e7bff1b96f37e2327b9772
font_02_sfnt_off0001f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4B0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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