Malicious PDF — malware analysis report

Static analysis result for SHA-256 08438146608c8ee2…

MALICIOUS

PDF

71.0 KB Created: 2021-01-02 02:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e464abdb7030e6b05a70f10286eb220a SHA-1: 1685dc1c27e9d9f605cc87010c91f76908870756 SHA-256: 08438146608c8ee277c6c6a9b9087e352b25c94eed39acd25a2059040903c754
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'sensualidad en una persona', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=que+es+sensualidad+en+una+persona In PDF document text
    • https://cdn.sqhk.co/xafiguzi/igX5Y0a/wallpaper_emoji_ios.pdfIn PDF document text
    • https://fumumakol.weebly.com/uploads/1/3/4/0/134017799/847612.pdfIn PDF document text
    • https://sevipopiwipuf.weebly.com/uploads/1/3/5/3/135302768/1742776.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/zixawazu-lunowo-xuwaxiwimaz-zesivuxitu.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/eejciey/knife_fighter_name.pdfIn PDF document text
    • https://derikuboxema.weebly.com/uploads/1/3/0/7/130776504/rirutabobowomija.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/3a4f042395d6b.pdfIn PDF document text
    • https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/9757589.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/3f943f6a-b7bb-44ee-b1b8-b5d52521b19c/foramen_of_skull_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a56a38-8c39-4d59-b1bb-321ad9ee3107/launchpad_mini_project_files.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9af18cc-8af2-4ea5-8ba0-73a40ceb16c4/89791752945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b95ee99-a9e6-456e-a391-5193f66beb20/valurulor.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/bestwap._life_movie_2019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD856 5016 bytes
SHA-256: 937a7d9ac1e96e99dd3614f9fe8f30972ac94aef86a96e4002e9c1be4fa7670f
font_01_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 11000 bytes
SHA-256: cda9d8d2ffd828e2237cd64fedec2238d57f0c790bc2bf6a6210330656f174f9

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