Malicious PDF — malware analysis report

Static analysis result for SHA-256 b528168bf942dd82…

MALICIOUS

PDF

68.3 KB Created: 2021-03-29 09:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d8b5317bd6fa72a07ca1fd404f8a8ed0 SHA-1: 3f3a3bdfc7a36440b2bd3f6b4ee2c97b1a50a9dd SHA-256: b528168bf942dd8295ddafb49fd0d05b3ab0ad90dc7075090b4fb8e1f101412a
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful 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://jacksth.ru/123?utm_term=ghost+shooter+movie+free PDF link annotation
    • https://pusudojajepi.weebly.com/uploads/1/3/5/3/135322366/4499480.pdfIn PDF document text
    • http://meetporte.xyz/can_hip_replacement_cause_piriformis_syndrome2f56j.pdfIn PDF document text
    • http://cparta.moscow/416595137993zhlt.pdfIn PDF document text
    • https://kutadaboveg.weebly.com/uploads/1/3/0/7/130738989/wepijujazuzodisur.pdfIn PDF document text
    • http://busibear.com/mowutavesoluvekidkd0va.pdfIn PDF document text
    • http://prostotit.site/jesus_and_the_disinherited_chapter_49q88c.pdfIn PDF document text
    • http://mmmmmme.space/filolodm5ax.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/15472696927.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/2b495953-9fe9-467d-af89-6fd04fd7bce7/luciernagas_en_el_jardin_pelicula_completa_pelisplus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537fc1b5-0114-48a8-af8f-1774dc40686b/74543072072.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/90206658733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7429165-99b0-41aa-9e6a-312b9c4c10e0/fitusadomuwadubabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e75cf5-a68b-4aa2-82ef-e08e617143b4/spark_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23fd5db-a364-460d-b09e-39ee67c1827b/42575413279.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/pamesakalokirazifiju.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/pediatric_allergic_rhinitis_treatment_guidelines.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_off0000cf5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5A 4856 bytes
SHA-256: d08a9070d60a2c81eb2f6b7d48700737d578d448cd8cd6a13bcdb185b25bebf0
font_01_sfnt_off0000dfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 11240 bytes
SHA-256: a24f2bc194f54198e80d5a7d611c67346224e0b90ef746a63216af38b7f4457a

Open this report in the interactive analyzer, or submit your own file for analysis.