Malicious PDF — malware analysis report

Static analysis result for SHA-256 2413d3b5cef2b875…

MALICIOUS

PDF

50.4 KB Created: 2020-11-02 06:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c6e33ce1915504a6ccc69f0849cbaf22 SHA-1: dd7f99b60788aa1aac83265ac2f05fbcd48d30d2 SHA-256: 2413d3b5cef2b87516a16aa2113f954a1d88aff9d783a0a31347469e699127b7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.com/123?keyword=opera+mini+apk+app+download+for+pc In PDF document text
    • https://pifejidulilev.weebly.com/uploads/1/3/4/4/134480865/jedofirewogur_detotadikux.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/3611699.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/b6077b58ea7457.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/78f66c12.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/bowuv_rojoximaduna.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/nonasibawuwodeg.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/4047785.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/subud/torileposibefazof.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/jurassic_world_evolution_pc_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/emma_goldman_anarchism_and_other_essays.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/xazujiniporime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f0b085-f30a-4c8c-b221-16ed77aaa3df/14072364283.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/39632401091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd6b0c9-f068-455f-87ec-8ae9a277665e/administration_internship_interview.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5308 bytes
SHA-256: c0df5cef49325a3808f00f02fd6e16e5221efb2e7ff4bda72c9cef1fe889040e
font_01_sfnt_off000072b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B2 2012 bytes
SHA-256: 1182553af4e4e1d4f08dc5c53a41ba3cf7bb24133579164eb638a84c8e765df2
font_02_sfnt_off00007be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 10768 bytes
SHA-256: bf410bcb693dccc344c15bc369111182640ecc6edb4606fe566233f2e927ddb2
font_03_sfnt_off0000a086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA086 18280 bytes
SHA-256: b4d4c30416cf85c3da045bcef3b13f59c713af6d1e7cc323264bb4e75a977352

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