Malicious PDF — malware analysis report

Static analysis result for SHA-256 022ef9e424375502…

MALICIOUS

PDF

90.1 KB Created: 2021-03-26 04:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 245bbce730272d10a673e82b4b75750e SHA-1: 16b6aa4da70ff36d46b8e1e64d62660d61e8bf14 SHA-256: 022ef9e424375502cb38045408f84f664c71828e1694d49ce9b3a0c3934f33b4
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-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/wix?keyword=new+nurse%2527s+survival+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/gubisagebuto/fiihgd9/tajagogotik.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/76771399503e916w.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/9761741990.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/xurozivunuw.pdfIn PDF document text
    • http://tersq.fun/jabog1yw0p.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/plague_disease.pdfIn PDF document text
    • http://mrshadow.net/75590742895iiq2f.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/agiheTB/shipwreck_museum_whitefish_point_michigan.pdfIn PDF document text
    • http://cmbespaceclient.xyz/tejaxatovifusolubilizokmzwpi.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/eIjeSpI/laguwajasegozubaso.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/jawidunefovovek.pdfIn PDF document text
    • http://masito.space/2020_kawasaki_kx_100_pricetoit4.pdfIn PDF document text
    • http://tamakar.xyz/temofoctknv.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://bifakafuwal.rf.gd/john_thompson_easiest_piano_course_part_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39712810-9a78-44d9-a54a-3562b6298407/history_of_modern_design.pdfIn PDF document text
    • http://negatesuxa.epizy.com/zaliwezurufukuvoluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b910ce-1019-40fd-bd1e-1aadd5c10397/49631616609.pdfIn PDF document text
    • http://fegozovot.rf.gd/21178479496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5d9aa9-2f0a-467c-b6ba-415f2fb91a24/ionic_and_covalent_bonding_worksheet_doc.pdfIn PDF document text
    • http://xonifovozub.epizy.com/citra_3ds_android_apk.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

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_off000113d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D0 5056 bytes
SHA-256: 83901686104691761dd119177fc86f455d0ca80dfc0a3aeef746ae645d0b338a
font_01_sfnt_off0001252a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 12160 bytes
SHA-256: fb9bf87f8959c85813b83abebde92df33286031282aad19f76866ca1e0399dbf
font_02_sfnt_off00014cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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