PDF malware analysis — malicious · a6966913846da4b4

MALICIOUS

PDF

85.3 KB Created: 2021-05-30 20:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: f425c162df9aeaca3dcd398b2e2701c7 SHA-1: e4c261e713c1ae813166900daa36f9f45dc3aaa3 SHA-256: a6966913846da4b4d8eb88d3ec3c8bb38ebe5c30f5976ce520ba83d4e40fc2bf

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 pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The primary URL, https://druttle.ru/strik?utm_term=julie+of+the+wolves+pdf, is likely used to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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 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://druttle.ru/strik?utm_term=julie+of+the+wolves+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4370555/normal_60564a5153a4b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490252/normal_60183f3e964fc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471481/normal_600657c3cde39.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366666/normal_606099abb2140.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487906/normal_5ff4933bde5ce.pdfIn PDF document text
- https://fixabewol.weebly.com/uploads/1/3/4/7/134711766/515047.pdfIn PDF document text
- https://donobemibuv.weebly.com/uploads/1/3/4/5/134512533/9949868.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4407749/normal_60b38feda63b3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460968/normal_6004154bb8eaf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444096/normal_602e0c9fced13.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465935/normal_60008bec305b8.pdfIn PDF document text
- https://masoluvilat.weebly.com/uploads/1/3/4/5/134576839/vupunegumizubukase.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444098/normal_601dbc923e35e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480581/normal_60649286d0943.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485457/normal_602303edc99c7.pdfIn PDF document text
- https://difidewuwigexej.weebly.com/uploads/1/3/4/6/134652805/zakuruborazerutuvida.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489713/normal_600db7b66fa91.pdfIn PDF document text
- https://selikiwomutarew.weebly.com/uploads/1/3/5/3/135329437/4fd79f4102cf7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462681/normal_6020fbf5bd744.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4388626/normal_60afed9e6e503.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://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_off0001045a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1045A	4740 bytes
SHA-256: `b26d8c6f464b578fc9f750415cf08303dcc65cc059b85cc6c4073b2809cea55c`
`font_01_sfnt_off000114ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114AD	10928 bytes
SHA-256: `6131eb5a44496bb61be9925b4ab26d8a9047cfeaadef2542472a173adf261dc4`
`font_02_sfnt_off000139ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139EF	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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