PDF malware analysis — malicious · 6a3d960bc3971090

MALICIOUS

PDF

81.5 KB Created: 2021-03-23 04:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 1fd3a0bb064b5282113525dc2e521e73 SHA-1: 2c30ce960acf36b4b568b49eda4983261e5240a5 SHA-256: 6a3d960bc3971090a740648e058121252bf1287e77574b220c3fe17193b7e9ec

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by multiple heuristics and a machine learning 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 document body, though heavily obfuscated, contains keywords related to health benefits, likely a lure to direct users to malicious sites.

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://jacksth.ru/strik?utm_term=beneficios+de+tomar+cebada+perlada PDF link annotation
- https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/715d04.pdfIn PDF document text
- https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/6415744.pdfIn PDF document text
- https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/libidamunasom_rimomuralifo_binupukiganis.pdfIn PDF document text
- https://sagokawosulo.weebly.com/uploads/1/3/4/9/134904643/2012125.pdfIn PDF document text
- http://lewabuvuk.22web.org/ringkasan_materi_biologi_sma_2020.pdfIn PDF document text
- https://tamunalu.weebly.com/uploads/1/3/3/9/133999965/zizijigaxipibotexa.pdfIn PDF document text
- https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/f66c63f8d126a8.pdfIn PDF document text
- https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/1097291.pdfIn PDF document text
- https://zepusarogetiki.weebly.com/uploads/1/3/4/6/134687077/zajidu_fuxejug_zufudamujog_bazuwonivejasaf.pdfIn PDF document text
- https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/930925.pdfIn PDF document text
- https://jonenatone.weebly.com/uploads/1/3/1/8/131872225/1298514.pdfIn PDF document text
- https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/zifedikulujorekepe.pdfIn PDF document text
- https://xoxawipexari.weebly.com/uploads/1/3/0/7/130775732/wapodevasamafi.pdfIn PDF document text
- https://tedenugimug.weebly.com/uploads/1/3/4/3/134345185/letolo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://fenulujexita.epizy.com/35290592709.pdfIn PDF document text
- http://jokiperone.epizy.com/28002004135.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f72e460-a594-4be5-b60b-3a50adf4a04b/kalipedesudiwiwok.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0029aef6-37cf-4e24-b5ec-4d2367cb4a2e/roblox_clown_kidnap_command.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9696684-ea2c-4333-813f-4b86a29c4676/punabufogesifirak.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA22	5492 bytes
SHA-256: `c379be99962e82dbefd9e378d3b0bee654dbadbb79d5520802d81bfb60f3fd35`
`font_01_sfnt_off0000fca7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA7	6664 bytes
SHA-256: `02ab5d537d7a0045883972317cb7f4d9e4302c468ec86b009234adb6a80e6719`
`font_02_sfnt_off00010e30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E30	12556 bytes
SHA-256: `0800e084c889650c513596551bb7532880a1b1d662112a8799f245068b6b60e9`

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