PDF malware analysis — malicious · 4b1c4d49065749a3

MALICIOUS

PDF

130.1 KB Created: 2021-05-04 21:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 4b95b79f2ab8aeb0f52b60113bc1c8aa SHA-1: e6ccbdf7cfaa8f918cecdaa1a25311158394ea77 SHA-256: 4b1c4d49065749a3f4d4f4b28bf25ef61d6faa61baca7c72df3c0c8994599253

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 0.9989

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/strik?utm_term=does+costco+sell+firearms PDF link annotation
- https://cdn-cms.f-static.net/uploads/4402261/normal_603efb933b6cb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4410730/normal_5fe413466aea7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4373240/normal_5fdebf1d75476.pdfIn PDF document text
- http://bavedibigilomit.66ghz.com/23429263357.pdfIn PDF document text
- http://gujifofaxewoman.22web.org/android_google_sign_in_example.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379053/normal_5ff0352e66926.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460251/normal_6013b203ecd47.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414352/normal_5fcabab80739b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455376/normal_603eff4a9d081.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446029/normal_601fdee99b6fb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479445/normal_5fd263afc1490.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427274/normal_6001211432ea1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405687/normal_601cadd6ee6fa.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
- http://likifodafiduno.epizy.com/android_emulator_google_maps_not_showing.pdfIn PDF document text
- http://giratas.epizy.com/coefficient_of_performance_of_heat_engine.pdfIn PDF document text
- http://robowogutalopet.epizy.com/lumev.pdfIn PDF document text
- https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_8ed3195aea174a3a91fca91888c56b0d.pdf?index=trueIn PDF document text
- https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_30ac7b3effbe49838ef6dd5c401161c1.pdf?index=trueIn PDF document text
- http://vudujufilax.epizy.com/luromezasukipu.pdfIn PDF document text
- https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_18576110a18949c191fba47b198e4597.pdf?index=trueIn PDF document text
- https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_8e630650dbef465298079cdb8c62afd4.pdf?index=trueIn PDF document text
- http://sisawujeza.rf.gd/22167797714.pdfIn PDF document text
- http://pibanifadedo.epizy.com/95242191424.pdfIn PDF document text
- https://14579757-8399-40ae-9aa0-1c510f02119b.filesusr.com/ugd/5613ee_c27923b11f6c435a9ef23426407ff790.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001b5a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B5A3	4708 bytes
SHA-256: `dcb05d7161b6bd3985c6a5912fd3777d49e43984c7b03b0e63fd3a4ca925f337`
`font_01_sfnt_off0001c59f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C59F	11384 bytes
SHA-256: `d79830365ab208addff14a88af1883a76d5ecc1effe0811564556dda108d4195`
`font_02_sfnt_off0001ec6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1EC6E	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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