Malicious PDF — malware analysis report

Static analysis result for SHA-256 0149cdc882bfe48c…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 18:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3310e9df407ef779af8b9a48d5f998f6 SHA-1: 4a76e62da8e42d7e29d0618431df27b5cc8af9ab SHA-256: 0149cdc882bfe48cc2da8364176a25050f5e702c20abd17cdef84e8dd7217619
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

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/wb?keyword=sex%20and%20the%20city%20season%201%20episode%203 PDF link annotation
    • http://paselon.getenjoyment.net/64647762632.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/zizejetaduvalod.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/best_photoshop_books.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/dafoxasaxarafas_mepijuzeni_sinoregafuxav.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/uc_riverside_sat_scores_2019.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/kidde_kn-cosm-1b_recall.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_601bd1cc06202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_6026629caa392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_600e6d5e1754e.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/3544420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_6034c7db284de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rabatelekovufar.myartsonline.com/how_to_adapt_formative_assessment_in_distance_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/ravakabijemidaw.pdfIn PDF document text
    • http://kesotufujurox.rf.gd/48820289919.pdfIn PDF document text
    • http://vuxalono.epizy.com/tutorialspoint_android_full_version.pdfIn PDF document text
    • http://banugigo.epizy.com/crystal_report_viewer_browser_compatibility.pdfIn PDF document text
    • http://vudasuluwiviwaj.rf.gd/bible_study_guide_from_genesis_to_revelation.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/makomirusotewudosem.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_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 5524 bytes
SHA-256: dd0a431c2cec9cb36af8c40f2220f4f5b19a06c2e4d17473625a2ff9b0cd9123
font_01_sfnt_off00011571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 9936 bytes
SHA-256: c12a4ecae0b4a02625d032be1c9d636c6b18842b5b9f21110d68bc901e16514d

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