Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fc1ba1a7cef606…

MALICIOUS

PDF

80.9 KB Created: 2021-01-17 18:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4cb063b241eb562ed97a5f9b1660c2c SHA-1: cdace4e22f2bd4cd8b981df2b1dbf5d76ea14bb5 SHA-256: b0fc1ba1a7cef60685656e64c90de7232d937d451f99f1dac02fcd4dc47ac2c5
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to known malicious redirector infrastructure and a link farm designed to distribute more malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests a redirection-based attack.

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.
  • 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://traffking.ru/123?utm_term=word+whizzle+insurance+answers+poetry In PDF document text
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/9685939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5f9e2fd5de679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_5fb7fc99b7932.pdfIn PDF document text
    • https://bepagiji.weebly.com/uploads/1/3/4/3/134352373/lixajotafuzedawarum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fa04c68b095e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fd79db3a3edd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5fbcff0912bc1.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/igdhiG1/ziduril.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f9495527fef6.pdfIn PDF document text
    • https://cdn.sqhk.co/liregagibago/ahcjfTN/31256582637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_5fe785b4a7857.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/megodipewukitoj/nikola_tesla_biography_in_hindi.pdfIn PDF document text
    • http://novosumagib.epizy.com/xefibajowusaxakaf.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_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 5416 bytes
SHA-256: 22d5a6f64d94def9da852d522c0a607082b2ea38aa03449649e9ad425328c651
font_01_sfnt_off000111f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 10716 bytes
SHA-256: 4d03b4eb0f340a40f76d183d0077f94965269e7d7ef5a5b73116eb1563000ce0

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