Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b59e03f6aae1d1…

MALICIOUS

PDF

78.9 KB Created: 2021-02-22 02:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2ea1433cb091355bfa49c8f8046bc344 SHA-1: 651731d37315a79feab3c5525c2937d35e3190e1 SHA-256: 67b59e03f6aae1d1e79509ad9a020bb2150a05190a7c23d21488fcec73b2c664
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm. The PDF's structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content or phishing sites, rather than delivering a direct exploit.

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://jottigo.ru/wix?keyword=slope+computer+games+unblocked PDF link annotation
    • http://teaapple.space/avatar_2009_full_movie_in_tamilqksgz.pdfIn PDF document text
    • http://harkateine.fun/beatles_guitar_chordshx21q.pdfIn PDF document text
    • http://italywow.pro/componentes_de_google_SketchUp_3D_bohclg4.pdfIn PDF document text
    • http://petersikdar.com/the_lover_duras_goodreadstwqy7.pdfIn PDF document text
    • http://hugertely.xyz/658912059354gnqa.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/nijazemijedmf46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcc725c9a7a5.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/53075775995gl584.pdfIn PDF document text
    • http://getveran.site/esc_2019_guidelines_diabetesffo0x.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/e2dUMlF/dirty_cartoon_stickers_for_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/jcqzWgf/kaiser_urgent_care_pasadena.pdfIn PDF document text
    • http://scandisvet.ru/28026284946qqh37.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
    • 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_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 5532 bytes
SHA-256: 7cd1d1cb950c51d1674cd1c42f96ce57d56f249ae31026fb52c8818d6199e943
font_01_sfnt_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 15440 bytes
SHA-256: 83dd955edb41078bcb7c3956be37c77a85854fc2703329502755a826518923a3
font_02_sfnt_off000120bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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