Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6b6b8d07204e0d…

MALICIOUS

PDF

76.3 KB Created: 2021-02-02 11:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0cbd4476959fc2d6634733c4885b08d9 SHA-1: 16b03cdd741ed24ee4138af54fe8da1a577c9633 SHA-256: 1f6b6b8d07204e0de690471707cd6e5a1978f453d61ac7779c9c83d53fbdf995
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains a URL that appears to be a lure for popular content, indicating a phishing or malware distribution attempt.

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/aws?utm_term=telugu+bahubali+2+movie++full+hd PDF link annotation
    • http://repovor.22web.org/taiwan_vpn_private_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/Vgfhahb/zumamudekudujuxojugol.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://sawokinajiralar.rf.gd/67666089557.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/dunepututexobabawodi.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/azur_lane_formidable.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/honor_7x_screen_replacement_guide.pdfIn PDF document text
    • http://memajale.epizy.com/aids_full_form_gujarati.pdfIn PDF document text
    • http://viveguwoxifug.epizy.com/rugazedateriw.pdfIn PDF document text
    • http://xatudoxi.epizy.com/koine_sheet_music.pdfIn PDF document text
    • http://vumojixo.epizy.com/burndown_chart_template_google_drive.pdfIn PDF document text
    • http://roniwixanedif.epizy.com/52867001798.pdfIn PDF document text
    • http://wubuxosivukip.epizy.com/61453963218.pdfIn PDF document text
    • http://kowelakava.rf.gd/79344400209.pdfIn PDF document text
    • http://godolefimew.epizy.com/hcm_ripa_full_form.pdfIn PDF document text
    • http://kuparego.rf.gd/fodobiwekolunokinofarep.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_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 5024 bytes
SHA-256: f5399ff5844fc68301ef2480a2f16fb7cfd371df07b24c64a72d1a971f988cfe
font_01_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 10920 bytes
SHA-256: 9cd41bb5c236a02dda50c008f2685be40715ec79d22ecf701211aaafa3408d7f
font_02_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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