Malicious PDF — malware analysis report

Static analysis result for SHA-256 4762c3283a9a5a0d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-05 23:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3d756bccf3f392862c64bfd02001e3b3 SHA-1: b91d6614ac07a6bcb2268815688383e306fe5859 SHA-256: 4762c3283a9a5a0dada9647d1301935709ea2fdb808f1799cfb7c1ce7c61e8e1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious domains, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=evidence+that+demands+a+verdict+study+guide+with+dvd PDF link annotation
    • http://wibusutozojoz.iblogger.org/what_are_the_types_of_construction_projects.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/bob_evans_full_dinner_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/ZlUiagc/fosasava.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/emOjcFZ/43815845068.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/66851068078.pdfIn PDF document text
    • http://volewug.iblogger.org/psychology_lab_report_example_apa.pdfIn PDF document text
    • http://zupurowuzuxule.iblogger.org/pobelojujijonuwizipa.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/zghhbKl/audio_spectrum_after_effects_plugin.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/1e2892b6-7a18-4966-b840-2edac622cfff/13123769433.pdfIn PDF document text
    • http://favuwoti.epizy.com/65750919877.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/tutarorefipazapebojulam.pdfIn PDF document text
    • http://relujoji.rf.gd/36116989658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c611238-a3ff-4e76-a34e-363a77e1e5b7/grammaire_progressive_du_francais_a1_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17081df8-c836-4b9b-8f23-25ec82ac78fc/24436668263.pdfIn PDF document text
    • http://ruvoluze.rf.gd/the_anarch_dan_abnett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bb9ead-cb56-4172-893c-09e00b43b9df/37207152071.pdfIn PDF document text
    • http://fobifuv.epizy.com/dutasikagut.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/merciless_indian_savages_shirt.pdfIn PDF document text
    • http://xedonufil.rf.gd/alta_via_1_dolomiti.pdfIn PDF document text
    • http://didigenekogama.epizy.com/how_to_get_best_quality_music_on_iphone.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_off0000e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 5532 bytes
SHA-256: 333cb4c5e812cbdb2af5d89d29e71c7d4b8878c5fc1d42f722fc0c0842211671
font_01_sfnt_off0000f962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 10168 bytes
SHA-256: 5c7e36bcb808b4f3ac636a1b6f10c26605570faab793a22769520299b46d5524

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