Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee276ce23afaf9…

MALICIOUS

PDF

67.0 KB Created: 2021-03-14 07:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 038bd095d9a07a22ef1b1cc8977be29b SHA-1: 502e4c3e9e848986ea712ef7505e7bc9ac572c83 SHA-256: 51ee276ce23afaf9307cf188c7f06c4ed26537820c5e5e92e1f33d1b8247a3b4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution lure, likely initiated via spearphishing.

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://jottigo.ru/wix?keyword=manual+tattoo+pen+permanent+makeup PDF link annotation
    • https://cdn.sqhk.co/gejixoneku/zYZhagh/68767319406.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/zuwemunarodod.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/81312768772t06wg.pdfIn PDF document text
    • http://changepass.online/3528694434e9yia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_5fd702cc81b34.pdfIn PDF document text
    • http://itchia.space/minagikifirubobigelesedtpksv.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/BxhaVgf/71006244808.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hdidwjd/wwe_raw_results_live_wrestleview.pdfIn PDF document text
    • http://copyright-helps-team.com/lewis_structure_practicedc07y.pdfIn PDF document text
    • http://dk-inc.xyz/dexezabokilavag1k8bs.pdfIn PDF document text
    • http://mabay.fun/defendant_s_answers_to_interrogatoriesio8ku.pdfIn PDF document text
    • http://parkji5x.xyz/95894804211xvin3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460071/normal_602df038d035b.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/fFjdgci/vofijutekutex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5fc861075cfd8.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/v9Jjiia/wafenanovotitobim.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/5004466e-fa7d-4e4d-a1ff-1fc90e623d24/259703904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76298a77-b2d1-4eaf-91d0-a780a2cb3e40/the_secret_book_by_rhonda_byrne_free_download_in_tamil.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/petit_nicolas_film_complet_en_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705fbd36-a342-4b24-8fad-03b56cf8c044/is_blood_bowl_2_worth_it.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 4856 bytes
SHA-256: 04873fda40bf1eaa50bc29eb04730dab5f386afe2c5906ac353a17200dd8fd04
font_01_sfnt_off0000d958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD958 11112 bytes
SHA-256: 30bb647d71097a58d7b35b4e91a02602e8c43a991801d41725593e41bbcadf61

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