Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c062e8c7beb5e41…

MALICIOUS

PDF

84.8 KB Created: 2021-03-29 05:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 34abe563a280c038630f7b51ef1b6d19 SHA-1: 5f60e440d5d1117c8691e4e0f485e7e095d7bb7e SHA-256: 0c062e8c7beb5e41d9fdefda32e60c6384bf591d91929ba1ea77855be8417cc9
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to 'pelibifir.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to appear as a legitimate document while redirecting users to malicious 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://pelibifir.ru/123?utm_term=balanced+scorecard+performance+measurement+examples PDF link annotation
    • http://grandov.pro/fobatiguvisisifegoluxago69bx9.pdfIn PDF document text
    • http://igcopyrightclient.com/simple_proforma_invoice_template_xlseib0c.pdfIn PDF document text
    • http://dostafood.xyz/96881996075hknte.pdfIn PDF document text
    • http://dmdmassage.com/selotuvaxabebuvejes0yic.pdfIn PDF document text
    • http://cheatyou.site/93711663054sdcmi.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/how_to_setup_hp_photosmart_7520k3vkg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce8c1e18-9ff7-4ec4-b005-83b1014ee450/music_notes_drawing_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63de03f-4058-472e-9fe8-2455113dd49f/busitit.pdfIn PDF document text
    • http://kolenexe.epizy.com/watercolor_artist_magazine.pdfIn PDF document text
    • http://tumoxotakim.epizy.com/xopeleberivitasajavuvuvir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859d296b-edfb-4a22-885d-a62c28f420fb/rofikemotamutaw.pdfIn PDF document text
    • http://remibuvemofe.epizy.com/nipim.pdfIn PDF document text
    • http://fojodopid.rf.gd/afl_tipping_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e796279-89cc-42e8-80bd-6bb4e6793bad/wukuxunawesoruxurunobi.pdfIn PDF document text
    • http://puxitisajit.epizy.com/zinafov.pdfIn PDF document text
    • http://sinodigewenewe.rf.gd/faraday_law_of_electrolysis.pdfIn PDF document text
    • http://fajamoluw.epizy.com/31151992187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076d7a4c-df2b-4bba-b81a-3673e7264770/primo_water_cooler_leak_guard.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 5252 bytes
SHA-256: 7229c271e671b87df5a656a42f84454191f642b102f8e2494cd67c7e4ea964b3
font_01_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 11236 bytes
SHA-256: 5aacb0a6c84072f85f066a39d08e3296d48e072718cc5ebe154c31c6205a0aab
font_02_sfnt_off000137bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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