Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ae91ea83af96fd…

MALICIOUS

PDF

65.1 KB Created: 2020-12-22 18:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3595c2f38822bfc27edb9338fd9d896b SHA-1: efe54c6d4e353b2270513db6800d3f4da8db631a SHA-256: 32ae91ea83af96fda70e9ea728da1ba7544fc50076e3842424b8d5a90d311c83
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

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=points+line+segments+lines+and+rays In PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/ae303137.pdfIn PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/5e5d81234.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/851377.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
    • https://uploads.strikinglycdn.com/files/266febe5-75c1-4336-92fe-06a610a111b9/monty_python_last_supper_skit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4217c49a-8120-4890-9b10-c909dc7e1e1b/90557599417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e850ed8a-5928-4fb3-89ce-4239e6f45ace/mudemanifupogavugevaned.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/38571632334.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/motor_vehicle_tax_receipt.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/inter_1st_year_economics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/bollywood_movie_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/wepotimegiwux.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_off0000b66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66A 5036 bytes
SHA-256: 529ea5726117fc6e5e56d1a31ff2c1319261947602d0ddc641b9d19934740cd4
font_01_sfnt_off0000c762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC762 10196 bytes
SHA-256: 0c51f476e73507d65bec7610804cd89ad6703853506967dc3e5e34a3e19b7623
font_02_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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