Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd0948e2ecaa8c4…

MALICIOUS

PDF

81.5 KB Created: 2021-04-12 15:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0ce3815ae180e0e9fa815113dcbc93d5 SHA-1: 2611df5f342584b48dd86a453b4dbc2a58cb4d6d SHA-256: ddd0948e2ecaa8c440aae1867a7804eaede58d87b68b5816e4cc59b8fbef0e7f
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely intended to deliver a second-stage payload or phish for credentials.

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
  • 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://midufefew.ru/strik?utm_term=the+ways+of+white+folks+analysis PDF link annotation
    • http://xekaminam.22web.org/7234577498.pdfIn PDF document text
    • http://gixofufivexofu.iblogger.org/45552651124.pdfIn PDF document text
    • http://cg-designer.xyz/55477963925u16m7.pdfIn PDF document text
    • https://cdn.sqhk.co/pusizewa/jfLFZgf/n_d_a_form_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/9ieijhd/firefighting_supertanker_services.pdfIn PDF document text
    • http://musc-media.xyz/the_fantastic_four_full_movie_in_hindi_download_filmyzilladzf4x.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/75971469000d749p.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/4378de83-8fd5-4de3-af53-e951964735a6/hugo_weaving_marvel_movies.pdfIn PDF document text
    • http://fesejawezu.rf.gd/risperidone_davis_drug_guide.pdfIn PDF document text
    • http://vuvinumebipoje.rf.gd/interior_design_basics_bedroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37eaf10e-a290-43be-9977-651a31f3cf76/what_is_the_most_smallest_animal.pdfIn PDF document text
    • http://mixaluzosibad.rf.gd/48959391722.pdfIn PDF document text
    • http://pisexudovekozus.rf.gd/paint_the_town_red_demo_free.pdfIn PDF document text
    • http://miwuzira.epizy.com/zetoxufe.pdfIn PDF document text
    • http://bokapiwupepox.rf.gd/ielts_speaking_test_practice.pdfIn PDF document text
    • http://tudaxagobex.rf.gd/10775298575.pdfIn PDF document text
    • http://wakurenup.epizy.com/amandemen_uud_1945_1_4.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_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 4968 bytes
SHA-256: b7f4f351a441b0ff1f6107ae2bfcc94a9600c95b2db46175424ed4d7586bfd50
font_01_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 10864 bytes
SHA-256: aaad45c9f65968d64ac885dc9bfe54893a5993ffdf36d23af60773eef359c52e

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