Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb78171b04aa9390…

MALICIOUS

PDF

66.0 KB Created: 2020-11-13 00:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e2c078ad88435b380203bb18c85cba2c SHA-1: b8552f2a3e95b7a97330991b6f8ecfd5c92499df SHA-256: cb78171b04aa9390fdff883c26a0652bea2b30483607ddac8d976736dd697b7d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates an attempt to lead the user to a malicious site, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=whiteside+router+bits+ru2100 In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/zejarajakekonevid.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/7011118.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/ed923.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/850b71a3-e074-4b08-8d2c-9b578fcd6d34/wawosin.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/gudazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b24cc9-4ada-4017-830f-b0b184db9132/34820811097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7d9dc3-bb30-4e79-831c-c73f6bcb82a7/free_bunga_citra_lestari_memilih_dia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59091d28-92ce-40d1-abc6-0375f45c505f/18306623108.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/btd_unblocked_hacked_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2d0ae3-a4c6-4525-8aed-583d46fb48a8/2121106208.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/91073031849.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_off0000c4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 5152 bytes
SHA-256: d2aa8d39636455bcd2816a980d08e96e8fbaae627c4b2125098b55a2dc2e39a9
font_01_sfnt_off0000d654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD654 10752 bytes
SHA-256: 0f02d422e6a7ca01aaf8c25b35aca1163e62faecfa4723478a1407b60fc6b015

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