Malicious PDF — malware analysis report

Static analysis result for SHA-256 67859370fbf6b371…

MALICIOUS

PDF

79.3 KB Created: 2021-01-08 07:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 60855304f5fa68caaee4eb41c78c38de SHA-1: 6d10a2920d6e99ac13b218410db4e5e8388ce552 SHA-256: 67859370fbf6b371dc47f8e02ad595c55116726a2503692eef93347cf51ae210
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL is used to lure victims to a site that likely hosts a further payload or phishing content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/aws?utm_term=bestiariusz+s%25C5%2582owia%25C5%2584ski.+cz%25C4%2599%25C5%259B%25C4%2587+pierwsza+i+druga+pdf In PDF document text
    • https://cdn.sqhk.co/mitugejaxel/fNhh3Z2/jazenosasewawisej.pdfIn PDF document text
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/tegab_sekibutawojow_bajelep_zapufavobox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5fa046ae6b23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_5fe9b68f85a79.pdfIn PDF document text
    • https://sidujojuwizubal.weebly.com/uploads/1/3/4/5/134587716/acc0575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389816/normal_5fe214e066a00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413469/normal_5fcaf549c40fa.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/tjeWbhc/tickets_radar_concerts_sports_theater_festival_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/aH3heib/blazetv_promo_code_free_speech.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/wozowuledij/2018_games_list_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/nafoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/61112203761.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 6284 bytes
SHA-256: 1918a91352a1764674ba1f1822bd182f02aad1ba248b52daf76fb5e8e6a77c0c
font_01_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 11776 bytes
SHA-256: b9ce5b08c5eddd8848ed6659c479c7afddfe6c395c9899e6914154d099c92820
font_02_sfnt_off00011683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11683 16860 bytes
SHA-256: 3a3feeabf37be8b4f7349287b978e3b4d900edac49d5e4db8b5cd7f47c6bc1a0