Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f276cb8c71f405…

MALICIOUS

PDF

133.3 KB Created: 2021-04-12 08:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c9dcc80db43013c146686ba136697924 SHA-1: 1789882d1f3f8c8b03f03de898a97f95d2b2e3c0 SHA-256: 06f276cb8c71f4056644c41fa9a1b9baa7c1636afc0121c5ff16e95903df2f2f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://pelibifir.ru/strik?utm_term=tabla+periodica+de+los+elementos+actualizada+2019+completa PDF link annotation
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/3786881.pdfIn PDF document text
    • https://foregizof.weebly.com/uploads/1/3/4/8/134890581/5215043.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/sujax.pdfIn PDF document text
    • https://gosalojuwik.weebly.com/uploads/1/3/6/0/136050429/futiluleramusugekiwa.pdfIn PDF document text
    • http://gitixitevusud.22web.org/logitech_g710_gaming_software.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/tolivajupeku/22463338225.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_1cb55894846c452fa98f9398778ce92e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/1000_most_common_chinese_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd7bd3d-90dc-42db-ab7c-6f1cb55853b6/fowajojawuxoxovoxamuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db104e6b-9a84-469b-abda-ba1e3b769ff3/nipebitatizadijezuza.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/23351732217.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/how_do_you_write_a_child_case_study.pdfIn PDF document text
    • http://vokofabowomiwe.epizy.com/effects_of_unhealthy_lifestyle.pdfIn PDF document text
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_b60facea0276414ab6c8c340cdc3b135.pdf?index=trueIn PDF document text
    • http://ketawod.epizy.com/48758002741.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_9418cdb8d8b8468290b6b0ba48f311b2.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_f1e5b6094bf2470c80fc71da31c54e00.pdf?index=trueIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_edb6012ecca94c5e9b894d74cacf4509.pdf?index=trueIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_4e39a9aaa4734214b4b59bb8597bccd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/14544114552.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_477775caa62a4d03885444ff9e302686.pdf?index=trueIn 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_off0001ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA48 5840 bytes
SHA-256: b77c73d158e6a258907d4eaff1e86e6deffed0de2dee338f42056b7349e2934d
font_01_sfnt_off0001de10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE10 12816 bytes
SHA-256: 8f0550b0d75bcd51dc37e04c6580195ef6ab5604d825ee3cfb812b95b81d40d5

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