Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17b0d797f7b821d…

MALICIOUS

PDF

85.5 KB Created: 2021-03-28 10:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cd7af174671e22f8588b035d2b5dcd87 SHA-1: 5777197dfb4cefd190e609164ca7c76ace69cc5f SHA-256: b17b0d797f7b821deeb85cc504657e46efbaa37d8441261a2c6ac7b722ba4738
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 0.9996

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://ponafet.ru/strik?utm_term=back+to+eden+book+free+pdf PDF link annotation
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/juriridaf.pdfIn PDF document text
    • https://wewopamutufufo.weebly.com/uploads/1/3/1/3/131398135/kebemo.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/77520509346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_60208b38c0f89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5ff411bee41d0.pdfIn PDF document text
    • https://lisebozaran.weebly.com/uploads/1/3/4/6/134694889/4261074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_60142ee7f02ae.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/zoom_h2n_anleitung_deutsch.pdfIn PDF document text
    • http://rineset.xyz/7066782561irtg7.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/8ee15d8d6602ca.pdfIn PDF document text
    • http://test123test.xyz/poemas_cortos_de_poeta_en_nueva_yorkzzmfq.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/warframe_unvaulted_primes9ivhv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_6051f513868b2.pdfIn PDF document text
    • http://copytoshka.ru/sony_rx100_iv_second_handbpe0q.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/how_many_hours_do_you_get_working_at_starbucks.pdfIn PDF document text
    • http://pitushok.fun/sowegopejaguxemepemefijbz0a.pdfIn PDF document text
    • http://dmgameplan.com/lijitavoruvukzpy4z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_60082af65aa74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_602452a9abc70.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
    • http://zizenatoxu.myartsonline.com/55087339302.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/how_to_make_mead_like_a_viking.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_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 4932 bytes
SHA-256: 3f120eed7e295628415783a8810f064acfae4d65b4ab3db3ef2c627c89e3a6e7
font_01_sfnt_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 11096 bytes
SHA-256: 8672d010c29facbe658eeb702c0f1f6aca3d1b67fc57755febb870efd119820c
font_02_sfnt_off00013a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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