Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59b1815a767726b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 03:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2837b873afeea136d7052ddf0b43f869 SHA-1: c56a4c594f6309d9de2461e753bfbb187422d144 SHA-256: f59b1815a767726b9890614017c70f428b748a5a215699224650c649575e2f41
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-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://jumiwimov.ru/wix?keyword=quickshortcutmaker+apk+old+version PDF link annotation
    • https://cdn.sqhk.co/remokuvupen/eicBpid/87511769130.pdfIn PDF document text
    • http://tulinejifuwo.22web.org/dodoraz.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/dedurakipadavib.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/characterization_worksheets.pdfIn PDF document text
    • http://nudivupekol.22web.org/casey_pitching_machine_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/jjbahj5/normal_binomial_and_poisson_distribution.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/ijJi7ZE/limanitatozu.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/fvgi4jb/zidomifelipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_f69b1a6c3b3044c8844399b1b3830e01.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_9673bab239004452bd4a71c48e6dd87b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39774e3-b5f3-468d-b9f6-36e9b07df241/a_short_history_of_the_movies_11th_edition.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_c7a6bd2f71eb4492826f9ed86d5ad238.pdf?index=trueIn PDF document text
    • http://dojafeduzig.myartsonline.com/mevovozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be8ca1a-ae6b-42ad-8d67-5acb87fee4ff/cost_of_magic_bullet_at_walmart.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/gat_analogies.pdfIn PDF document text
    • http://gilaniborifavap.epizy.com/phonak_brio_3r-312t.pdfIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_cc6268d4e15b4b9e8cf505c1cc2fc560.pdf?index=trueIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_c12bf65692d74a2cb14258b0a1f2eee5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 5196 bytes
SHA-256: c7a15d7faff54685a48caf41660d00c5be157855d1a0b861ab9b6fef28394bfe
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 5496 bytes
SHA-256: 4e19f5c0e07cafe96264d79744df65776bcb17999ab2b95a35c0f44e41e77bcc
font_02_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 15292 bytes
SHA-256: d4831fa7b23e9fcb7e4db4b8644868e4ea8212332be3e5690a61c184c6f50e7d

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