Malicious PDF — malware analysis report

Static analysis result for SHA-256 0791d48e6c8705b6…

MALICIOUS

PDF

70.1 KB Created: 2021-04-23 03:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3c0a7f3136b4f859cca42834666fb776 SHA-1: 697abf29b16871704baed5c48fe685f87b0eba19 SHA-256: 0791d48e6c8705b68b59d57e457ecae82eb99e81f15fbe1e6946720a574de0b9
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 numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to trick users into visiting compromised sites.

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://baarspo.ru/strik?utm_term=graphic+design+jobs+near+atlanta+ga PDF link annotation
    • http://xerujupuje.sportsontheweb.net/business_report_writing_example_for_students.pdfIn PDF document text
    • https://juxufosuzuvol.weebly.com/uploads/1/3/1/4/131437906/ee8d72e7f.pdfIn PDF document text
    • http://wanididezaj.getenjoyment.net/tizolatapebagudes.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/biology_scientists_names_and_their_inventions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_6011b892a303c.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/xofejatul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff0d9ea9dbfa.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/cjchaha/original_barber_shop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5ff82e3444b67.pdfIn PDF document text
    • http://nunejabu.scienceontheweb.net/vegetarian_diet_chart_for_weight_loss.pdfIn PDF document text
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/1767440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_603efbeb69b29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450734/normal_5ff5275718937.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/zOgcIgd/90357679738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumugajus.onlinewebshop.net/54482862489.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/sabrina_movie_filmywap.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/18718336127.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/spring_framework_in_java_tutorialspoint.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_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 5580 bytes
SHA-256: 5eede2e510b218fa0dbc5093990db71b5666f0a2d5d8a10aaa33368fbf80c872
font_01_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 10996 bytes
SHA-256: d59a8314bf8e890d438dc976fda44617f031fadedeb37392cc69cfc535468ef1

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