PDF malware analysis — malicious · 48d3fa4bc06aacc3

MALICIOUS

PDF

39.6 KB Created: 2020-10-26 12:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: b56b363d7d2f8f7e525b93150619adbd SHA-1: 39d71669c4a13cf004f7140ba03262f724fb8f65 SHA-256: 48d3fa4bc06aacc37335f88381e3d2c3f0b09fca110f43e5f4b0b436db07aea0

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Sungrow sun access inverter manual'. The ML classifier also strongly indicated maliciousness. The primary attack vector is likely spearphishing attachment, leading to a redirect to malicious infrastructure.

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 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.
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.cc/123?keyword=sungrow+sun+access+inverter+manual In PDF document text
- https://cdn-cms.f-static.net/uploads/4374380/normal_5f8bace1bbe4e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382208/normal_5f8dfbfe4980f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378175/normal_5f95fbcfbe33a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369327/normal_5f8a0af75eae6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382789/normal_5f8dd20675729.pdfIn PDF document text
- https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/giveka_dimiti_kubunududifagi.pdfIn PDF document text
- https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/966153.pdfIn PDF document text
- https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/nutojugun.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidobojugonuxexoz.pdfIn PDF document text
- https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/1794229.pdfIn PDF document text
- https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/dibenirusupaligogik.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/34eda206-e168-4123-9cae-9f82224e2ca1/vupaxanenogozobavelej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1ffd571f-5d30-414c-8055-75f5acdc9841/the_end_of_the_world_skeeter_davis_guitar_chords.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a19446fe-0962-42cb-838d-c0b96a24d128/libro_de_patologia_oral.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a68d0d0b-192a-46c6-b748-b56deac302dc/53490805875.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aeed6cfb-7571-41fa-8594-5c4a4e56f866/32039388169.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/317b7e80-748f-4fcf-bea0-d46ccd51c11f/64332355847.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/274d1242-4c7d-44eb-8053-16f8bfb3feaf/97798169908.pdfIn PDF document text
- https://s3.amazonaws.com/susopuzupure/lte_capacity_planning.pdfIn PDF document text
- https://s3.amazonaws.com/subud/market_equilibrium_in_economics.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004f02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F02	5256 bytes
SHA-256: `f96028acea933711dac5bb58e1af1d0fd86aa8642ccb05c2c3f987bfc4e1a253`
`font_01_sfnt_off000060d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60D7	9808 bytes
SHA-256: `d9aeaf7d9bf3007e9d21ed3037dabecc2478061961acdc2e37803bc0695f4f6b`
`font_02_sfnt_off0000823e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x823E	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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