Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beaf1b18799fadf…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 09:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ca5e6b3031bc18221dc2356fc47db88c SHA-1: 3204a7472d7142cbb45827813d904666e473a708 SHA-256: 2beaf1b18799fadfc9ea2d634ca2864ec1d6e1797ded79e527f8af71772d6d2b
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a specific heuristic flagging it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to malicious sites.

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://botokaw.ru/123?utm_term=how+much+coffee+to+put+in+keurig+reusable+filter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5fdfada0de92d.pdfIn PDF document text
    • http://toppiksnack.xyz/firibosasjc1k9.pdfIn PDF document text
    • http://fowatufilomit.iblogger.org/wesatugunuvowufupos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490256/normal_5ff907d080ac9.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/jicCigI/junoxujofezedokoxugedip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5ff0086187e7e.pdfIn PDF document text
    • http://dnepr24.info/zivezikasugfuzuo.pdfIn PDF document text
    • http://susurrus.space/present_continuous_exercises_and_rulesc0nkt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386852/normal_6008a9900c9df.pdfIn PDF document text
    • http://hookup668.site/dealing_with_an_emotionally_abusive_motherhi1pu.pdfIn PDF document text
    • https://cdn.sqhk.co/waxusuxagaki/chfIzjc/ufc_fight_island_card.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/how_to_change_oil_in_toro_self_propelled_lawn_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/how_many_episode_of_death_note_are_there.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_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 5684 bytes
SHA-256: 6f199f366ae9714689cc5e5dff3f70db07c884e12615296dba0c6121927c3dff
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 10476 bytes
SHA-256: 304d1c6512a2ade1b9916fde16b6a9379a0abb2d364a84fc2b71a76a87043d51

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