PDF malware analysis — malicious · fc20361e5195e6a3

MALICIOUS

PDF

52.7 KB Created: 2020-10-16 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 2649a181c055a478044c81cd7d581641 SHA-1: dd8409d1885b81fce718b96e231c481f8bbebc91 SHA-256: fc20361e5195e6a3bdad59a0ae14f2caebea46e896456cc21ffddc3a93d2375e

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Nursery syllabus 2020 pdf'. The presence of a download button heuristic further supports the malicious intent of directing users to external, potentially harmful, links. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://gettraff.ru/123?keyword=nursery+syllabus+2020+pdf In PDF document text
- https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9add1a922.pdfIn PDF document text
- https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/rexarikijojoditoger.pdfIn PDF document text
- https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/f831e3bd630600.pdfIn PDF document text
- https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/basusutagutowewiz.pdfIn PDF document text
- https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/sasetex.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
- https://debasomi.weebly.com/uploads/1/3/0/7/130739769/jaxivedupedupuzalo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367617/normal_5f8903ebced10.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366311/normal_5f872665e461f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371497/normal_5f88f136374ef.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/7855/8899/files/amleto_testo_completo.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/7105/2703/files/nedekakuwonakevawe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/689cab46-55ee-4312-9ab8-a5cbf8d8d58e/56517057721.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3e6f6c57-58df-4757-af16-78e9ae3a427e/33222564006.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/86d06ee0-a7a2-4660-a5cf-651ab486d75f/24728536878.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f755fbc4-abf0-4546-b8b8-af754ef1ae55/somalakezin.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ec4f2ff-8fea-43e6-aa3e-c732e5ed9aed/roxobekusijujagaja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea5173a3-4867-444b-a87e-82cc7ca31cf4/bagare.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0000aa89.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xAA89	17692 bytes
SHA-256: `0eab233705170471edcee6d4cd0041fdc6ac0c916789ed9c06dfcc3531f68411`
`font_00_sfnt_off000074b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x74B3	5520 bytes
SHA-256: `a12f2f82a1a8c8e2c353ba6fa4a42bcebddef2609ad3423115b83c5514105ff4`
`font_01_sfnt_off0000878a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x878A	10156 bytes
SHA-256: `1b86e72cf5bd90ba3a20c48480be0768760faa117379dbedccc2f18ca8a36b99`

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