Malicious PDF — malware analysis report

Static analysis result for SHA-256 103ffcac2e445c1a…

MALICIOUS

PDF

64.2 KB Created: 2021-02-24 02:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 62869aa135f42b32a0c7e9703b7d363e SHA-1: 74d98fc17c4470f4ed23b0192fe183a422fc43d2 SHA-256: 103ffcac2e445c1a24c2cbdafb2348487a29c796bf6fdbc4d1f6f2296b3e6b5f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download a second-stage payload.

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://druttle.ru/wix?keyword=panasonic+kx-tga470b+extra+handset PDF link annotation
    • http://bighome.space/kamyab_jawan_form_fill_up8fh5m.pdfIn PDF document text
    • http://akfb.online/jeloribokebokabegg4c9.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/pirated_games_for_ps4rxx6u.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/fJDEZ69/4630486068.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/bojulonobaypb.pdfIn PDF document text
    • http://seamanygau.best/fettercairn_weather_reportqy8yg.pdfIn PDF document text
    • http://lidlid.xyz/diseccion_del_corazon46nyd.pdfIn PDF document text
    • http://bodyita.space/24528686115ax7bd.pdfIn PDF document text
    • http://trokot-new.online/kelinokezexukukoredagowessu16b.pdfIn PDF document text
    • http://bijatutolime.iblogger.org/japan_2016_criminal_justice_system_reform.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugazite.epizy.com/24565648239.pdfIn PDF document text
    • http://sipariwemarisu.rf.gd/18105290618.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/endocrine_guidelines_for_testosterone_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/apel_anna.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_off0000ba74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA74 5784 bytes
SHA-256: d194f346b2d4a4cb4d9f46ea8182fa770eb7322282f57a01d90fadbdbb3aa97d
font_01_sfnt_off0000ce33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE33 11532 bytes
SHA-256: 607fd324a7e97c0547715560b7b70bd812b0fe59e5f22b7652c8e555f7d54fa8

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