Malicious PDF — malware analysis report

Static analysis result for SHA-256 160f6a34ad5ea7fa…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 07:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0ab87608de5c567346bef861af049b89 SHA-1: 1c3a514cd4e1582dc08e0b937ae379d13c4bd4e4 SHA-256: 160f6a34ad5ea7fa05ce6aaef0e43c519ba5c2b80dec9d568e19da4baeec3243
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely aiming to deliver further malicious content or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=hua+hu+ching+81+meditaciones+taoistas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391899/normal_603e737c5cdbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_602de528d6f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fd8962690a7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459483/normal_60381bed610b1.pdfIn PDF document text
    • http://movigakamemik.22web.org/fomefawisebofomo.pdfIn PDF document text
    • http://kudretbozaci.com/59462006754zjt93.pdfIn PDF document text
    • http://datinge.site/converse_inverse_contrapositive_worksheet_with_answers2a8yv.pdfIn PDF document text
    • http://olymp-trade.top/traxxas_summit_1_16_vxl_batteryl6igx.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/RZL2ygg/7714608416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/99304157923.pdfIn PDF document text
    • http://banudozege.epizy.com/97081223845.pdfIn PDF document text
    • http://vopizezo.epizy.com/71408207783.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/22375935781.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/96033859521.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/xepuvewujofutarikevajuk.pdfIn PDF document text
    • http://vedaremix.epizy.com/navigator_of_the_seas_deck_plans.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/47941809162.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_off0000d211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD211 3868 bytes
SHA-256: 853b0088c1d8d0f7388ff91263edb15e27aa80f6c65b678ca277f4983afe8ddf
font_01_sfnt_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 5648 bytes
SHA-256: 744ee695f8268d7fa0caa39bdb4d8717b814371713646dd2c7f59c4b78420679
font_02_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 10392 bytes
SHA-256: b9427bc17342e73721af0a4a7a3ccc7d9d63a85baa9b7a85a91df619c245e706

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