Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b87be19adc7682…

MALICIOUS

PDF

89.9 KB Created: 2021-04-02 21:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1fb00de8ea74de8868ee997e8e82ee70 SHA-1: f974ca84a669c98a3f7a9aaf461b57433c0b6122 SHA-256: 32b87be19adc76829250b0f1c7e52a83af0770750ee4b27a0bc3885db831e9ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/award?keyword=dibels+8th+edition+pdf PDF link annotation
    • http://zoguponuwuxoli.medianewsonline.com/zabur.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/89801931437.pdfIn PDF document text
    • http://xivibogo.22web.org/buvof.pdfIn PDF document text
    • http://zudazejugimup.iblogger.org/59503241971.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_55a03ad1f97b4379aae1ce51759e5491.pdf?index=trueIn PDF document text
    • http://zazujipediwa.rf.gd/84039461664.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/scribblenauts_unlimited_object_editor_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75dc60a3-ac4c-4040-81d6-4914d3507317/motorcycle_diaries_full_movie_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4114512-556f-4477-bc97-ef733f95905a/sajeba.pdfIn PDF document text
    • http://vesunak.rf.gd/lupopojudusuduzikume.pdfIn PDF document text
    • http://bokipivumuripo.rf.gd/59145370485.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_4468dd4a0aaf4b56822b8a6d8e9ea511.pdf?index=trueIn PDF document text
    • http://xuwanuxetoto.rf.gd/dresden_files_peace_talks_chapter_1.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_aeab8b3122d746de86d9dd1145adc5a7.pdf?index=trueIn PDF document text
    • http://kofupugixujodin.epizy.com/37843293333.pdfIn PDF document text
    • http://kejidexod.epizy.com/porinuve.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/gabatirusarugivar.pdfIn PDF document text
    • http://sijugisuvaf.epizy.com/fejeganatira.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_off00011a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A19 1880 bytes
SHA-256: 1c2e59a59ea3750b9a290da80026f8b8f36e62db9d7db31ba1ef9423ba667d86
font_01_sfnt_off00012304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12304 5156 bytes
SHA-256: 2ef3adffd425e6f7bf00972198a591585bcc12b9bd62ab19c3655004c7cca873
font_02_sfnt_off00013489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13489 11044 bytes
SHA-256: 3abbe6d0335c82e493bc16ad6ec02a9df0c60c6c24b592f650ff8a9ba44a8fd2