Malicious PDF — malware analysis report

Static analysis result for SHA-256 59039aa58983911c…

MALICIOUS

PDF

78.2 KB Created: 2020-12-01 08:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ebe2167776102307baeef557c2010bc0 SHA-1: ee57b94834a304183069ecbf64305c9b7d2b5a4f SHA-256: 59039aa58983911c43492bbe37d0f8eee999ab3c94403e759fb9c1fec92bde24
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, including a link farm, suggests an attempt to drive traffic to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=wii+homebrew+channel+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fc35e33cb615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fb2a0a5e950e.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/ruwidikulixotofo.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/vitelitubovuluj/bailey_s_story.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/convert_byte_string_to_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/fogewupiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/21810106695.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/70859949328.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/black_and_decker_weed_eater_gh1100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/channa_ve_song_johny_seth.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_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 5460 bytes
SHA-256: 956fe2c46ee3fc5fb5ea2275d6cd3139fc791d511322717eba23cb6f6c681a49
font_01_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 10120 bytes
SHA-256: 36ea71f410258a4fef9423ad39cf82e76386761d7c0cff8c30727e188fbfb989

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