Malicious PDF — malware analysis report

Static analysis result for SHA-256 accdee1f051f5995…

MALICIOUS

PDF

68.6 KB Created: 2021-01-06 23:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 31ebe2b5a0d528705e9f77cabfc55f32 SHA-1: 7631921ca1374227117ecf75517b0d6fcfeb9fd9 SHA-256: accdee1f051f59955a31ff463e5e0f65573206ca9cf8c81a08bb4d31bc64105e
214 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a free download for 'secrets of jewish wealth'. The PDF also contains a large number of external links, many of which are likely part of a link farm for SEO manipulation. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=secrets+of+jewish+wealth+revealed+free+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fdb1f1a94448.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/lalepidoliniguvij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374196/normal_5fc88b21d6bba.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/lhgm9oM/99050024157.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/wapuvow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489402/normal_5ff60557c397f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5ff2d9fe36145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5fc888ca61559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5feb96c067993.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/ifgciaJ/guided_meditation_for_sleep_female_voice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_5fc6d54e8d761.pdfIn PDF document text
    • https://nalafefig.weebly.com/uploads/1/3/1/3/131379301/raliwig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c06c79-02da-4b35-81e7-696d8c8923a2/words_starting_with_ret.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_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 5576 bytes
SHA-256: 7a2a95c7d11dc02cda41760a8f2f696d35fb90df571d271e37a561c239a27530
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 10956 bytes
SHA-256: a1bc6d25ca043ca208bd599f4e595b36259f801e223c4fcac18db055a1735321

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