Malicious PDF — malware analysis report

Static analysis result for SHA-256 72197e6137cbaecc…

MALICIOUS

PDF

73.7 KB Created: 2021-01-13 16:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 529b9b3431a48c80056b0b4a012f29ed SHA-1: 916ee4cf744eb6305073084930dbe83c3312fab4 SHA-256: 72197e6137cbaecc7e97207a7776c1efff0e12a3258aa09c6f26a59e401c45fc
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with critical heuristics indicating it's a malicious redirector and part of a link farm. The primary malicious URL identified is https://cctraff.ru/aws?utm_term=passione+canzone+napoletana+pdf, which is likely used to lure victims to phishing or malware sites. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?utm_term=passione+canzone+napoletana+pdf In PDF document text
    • https://cdn.sqhk.co/xadowififux/ehbibgg/takijelivebobobedetixuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/javejako/hhheigs/40077507245.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/tiwilanidu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/igZjjrv/tuduvumujiwu.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/29f25c20709993.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/a2DXWhj/pepper_iron_man_2_gif.pdfIn PDF document text
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/wiwepemiwow.pdfIn PDF document text
    • https://rodawuliwunugen.weebly.com/uploads/1/3/4/4/134490897/vogukebexopoleno.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/jajuzasalikirut/rabatenujinanezerudi.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/44409840353.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/togijodagefabulo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/chinnari_chinnari_chiluka_naa_song_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/after_effects_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/canada_customs_declaration_form_e311.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/template_to_keep_track_of_monthly_bills.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_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 5104 bytes
SHA-256: dfa3fd9f9ba0c7e0463643ff22a50294333420973cfcea24ffae7ca2e638af24
font_01_sfnt_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 12652 bytes
SHA-256: 4a52498e22d453671cbe208f16fa4833a8121699063a6af8531e319261bed01b

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