Malicious PDF — malware analysis report

Static analysis result for SHA-256 03137ecd79d6d780…

MALICIOUS

PDF

154.0 KB Created: 2021-03-14 09:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1d3ef1738470005c00fd7ca96c4f465c SHA-1: bc6b0b79f904846ad85e70a641396940f1d5c93d SHA-256: 03137ecd79d6d78054c36d29affd4f85a2f58d74738f95a006f8a4ca41d67db6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to potentially malicious sites, specifically impersonating a McKinsey report. The primary malicious URL identified is 'https://crophysi.ru/123?utm_term=mckinsey+report+12+disruptive+technologies+by+2025'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt, aligning with the 'Pdf.Phishing.Trojan' detection by ClamAV.

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://crophysi.ru/123?utm_term=mckinsey+report+12+disruptive+technologies+by+2025 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491669/normal_60250507a3398.pdfIn PDF document text
    • http://helpcreditscore.info/geant4_installation_guidetzwus.pdfIn PDF document text
    • http://tovelksa.website/ncc_c_certificate_question_paper_2018w028.pdfIn PDF document text
    • http://topsale.pro/xomubupudideji5gxjk.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/3834107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_6014b49e2fd83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5ff0ef3359a4f.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/5e8a6ea3c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455890/normal_6002d4209a1f8.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/xefajag.pdfIn PDF document text
    • http://hookup682.site/26220380319yck9l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_a6f5f9e47e5e49d084d40a7892e66378.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2726690a-8dd1-44c6-b056-adc794622d63/xbox_one_wireless_controller_with_3.5mm_headset_jack.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/tudakodivovedikaburarab.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/wayne_dyer_contemplate_yourself.pdfIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_cbdc2a0e0faa4f00b1b4a2e117a1e05a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/apple_ipod_4th_generation_charger.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_ac88758c568245c5a2d79dfa9feab31d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/806ae266-266a-49b3-809b-6f137b2499d4/the_worlds_greatest_blackjack_book_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/63448934302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ca007c-97eb-4169-a15a-73c52f8f3064/nefitazixaw.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_off00021c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C1A 5948 bytes
SHA-256: 0632b566746ec9f44fe229928118a330392bff73a5b39e07a6c238531afd8918
font_01_sfnt_off0002307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2307C 12340 bytes
SHA-256: cd01510c06a9bda79e7fe43337b9bf4f477a1e948bdd8f476a6cee337d2d331a

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