Malicious PDF — malware analysis report

Static analysis result for SHA-256 9faa2d14a7706518…

MALICIOUS

PDF

84.2 KB Created: 2021-03-23 02:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ebba34dd032467318c9df1f43f4c4c1e SHA-1: 58c7121668e828ae4229e93b563e2f9f140c428a SHA-256: 9faa2d14a7706518a7d43be23d42277da0b316edcd8948f5cf83437ed69944c3
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 0.9997

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://lozipotod.ru/strik?utm_term=how+to+open+vacuum+sealed+food+bags PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453342/normal_6019dd10030d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fea2c5ed741d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5ff281e78e3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_604495c5d8e7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6022bc2217d3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_5fed6b20363ab.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/915e24dd-5b5a-48c1-97c4-2eb9fd791bb9/faduluxinuroroxasa.pdfIn PDF document text
    • http://pujusojup.epizy.com/ribuxememiligetetex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f797eb4c-2704-4f65-8261-2f884889dd47/28284003258.pdfIn PDF document text
    • https://321e46d8-a3e9-4523-905f-b0dcd1dcb7ef.filesusr.com/ugd/29fbc3_ba2ca2afff52456bbd68dbe376c7a13e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f51abae-7bcd-4226-bb73-837d4d462123/22536510488.pdfIn PDF document text
    • http://bowenadulopusin.rf.gd/42280335220.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_f7a93006d36f4050ae9038e9af633b09.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_5ad06792025f4a12867a7db9053c773a.pdf?index=trueIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_1a84e480960d438594e637a453c2dad1.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_ad5a115910154527ac48169f3b80d7f0.pdf?index=trueIn PDF document text
    • http://jokipuzovorije.epizy.com/bpm_tools_comparison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848456d7-7956-470f-9dc0-aab134374041/thesaurus_activities_for_4th_grade.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_a1eb9281a6224abf9ff4f5d6cb5357da.pdf?index=trueIn PDF document text
    • http://fewetero.epizy.com/bozubazopoxanubiw.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_b2086123e9804386aee1a552aed1892a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 5632 bytes
SHA-256: ae1595ca962096358983ac2da89b58724a22eba215135c1210deb60723421232
font_01_sfnt_off00011e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E45 10888 bytes
SHA-256: 493465ed3faffb21a8f1401f59d98053fabbdb5315ce7116228e0dddf259b536

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