Malicious PDF — malware analysis report

Static analysis result for SHA-256 03592a4f78a6c0b7…

MALICIOUS

PDF

81.7 KB Created: 2021-03-23 09:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f72fe3a5ed8cc36c559331342de62814 SHA-1: 1011726d3ef1b34b1b7f06bb9781c00f58651eff SHA-256: 03592a4f78a6c0b78f41c658b17b4f6a3b07575e2e87a013b444bc31ed403aa4
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 0.9992

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://vilenefex.ru/award?keyword=supply+chain+management+resume+pdf PDF link annotation
    • http://kuvezowepo.scienceontheweb.net/ceptam_notification.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/selbstschuldnerische_brgschaft_vorlage.pdfIn PDF document text
    • http://siteznakomstv69.space/first_aid_kit_emmylou_album62jdy.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/nubikemojomiauo5i.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/vuwijufexuwojaze.pdfIn PDF document text
    • http://deutschebank-meine.com/sharepoint_2013_website_design_tutorialxt41u.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/84970958892.pdfIn PDF document text
    • http://boothattendant.com/mourning_and_melancholia_summarym153b.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/30b4b317-30e7-4e65-a2e6-315d19a332a5/zegavulup.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_683323552a564fcaad53db74becc60a9.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_e059e44c037d49e8beebf202d3a05477.pdf?index=trueIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_460304e7257e48cbbc425134dcc71698.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db62d386-7405-48c7-ae62-38ddc84fdf4d/5457051611.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/69671346780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb19c951-39ea-45f1-a373-4daef3772b71/how_to_heat_up_costco_spiral_ham.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/ti_nspire_cx_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66add86f-3030-45ec-bca5-aa2cac531913/benusud.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_622105d2adeb4b40848e9d31dc92c7c2.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_8eb067db710d49d5ae57ddac63605eed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajixe/war_of_the_worlds_2005_film_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/mukujadikinilonu.pdfIn PDF document text
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_31e07c5e776d4103b03ca7c7bbf3cf87.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_70a45da4e1eb4e289d2786954a95a8d7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 5776 bytes
SHA-256: b82e5cbebe47eeaa0dfda4bca2a3a5ebd609bcae3a887ec7e9dbfb811b952142
font_01_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 13024 bytes
SHA-256: 0bece9972e89ec7bf035995ac259dce1f6c78d165831f39318f5a4f7f44aac15

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