PDF malware analysis — malicious · 84ac720136ddec66

MALICIOUS

PDF

80.2 KB Created: 2021-04-25 07:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 8d07194e58137b74ec5bb5db5310768b SHA-1: b0b573d2d044667ffbfd663c4cf421b1d5a3f2d8 SHA-256: 84ac720136ddec66914eae73ea8927eb9f66c244f8f1c6738b322bcdfc4cc7bd

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://lozipotod.ru/strik, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://lozipotod.ru/strik?utm_term=what+kind+of+salt+for+kenmore+water+softener PDF link annotation
- https://cdn-cms.f-static.net/uploads/4416299/normal_6062c84111d77.pdfIn PDF document text
- http://ruvenebigolusep.mywebcommunity.org/el_accidente_de_chernobyl.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380692/normal_603aef4332e3d.pdfIn PDF document text
- http://kilekapalovuzo.getenjoyment.net/bundesliga_2020_18_spielplan.pdfIn PDF document text
- http://nafarami.medianewsonline.com/siwozunozudemafa.pdfIn PDF document text
- http://povulofi.mywebcommunity.org/jotaxomo.pdfIn PDF document text
- http://visunuduxat.mypressonline.com/algebra_formulas_for_ssc.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://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_0dff70d7e7ee4868a0b189b2e9012a8c.pdf?index=trueIn PDF document text
- https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_22144b570e61469badc34a14669c0de3.pdf?index=trueIn PDF document text
- https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_17ac583b6fcf41839d183258ab7abb7f.pdf?index=trueIn PDF document text
- https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_f76953a6ac1d4e0abaa682ae323bfb7b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xoguwavosuje/setolipit.pdfIn PDF document text
- https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_34be12f334f34f63be98578f03fd7b70.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/negonanopix/flashing_led_using_555_timer.pdfIn PDF document text
- https://s3.amazonaws.com/jinotugiwomo/11371528457.pdfIn PDF document text
- http://novogizeboje.myartsonline.com/ielts_reading_band_descriptors.pdfIn PDF document text
- https://740e8036-3174-4dac-ae20-9eee1cd11a0a.filesusr.com/ugd/0f1c31_53a25294f0d34435b4ac3e1b516aebda.pdf?index=trueIn PDF document text
- https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_2b5f563808054e4cb706d7cbb2882d1a.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_off0000ee83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE83	5104 bytes
SHA-256: `b46644c221f4bcd754191e7352271eba1db47025ec57ebb45c790af1c43843e0`
`font_01_sfnt_off0000ffbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFBB	10944 bytes
SHA-256: `7288594f95ededca948a06eda0a377dc02f4a721bd0bdecc4e316faf8523d2a8`
`font_02_sfnt_off00012536.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12536	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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