PDF malware analysis — malicious · 5989dd92bf2495a1

MALICIOUS

PDF

81.8 KB Created: 2021-05-27 03:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: ee180a3727ee4182aa228b7762dc2b04 SHA-1: e63c2ad9a325a17359e2cfac82a3ecdf9eabc649 SHA-256: 5989dd92bf2495a14916ad77c71cf6b659d6042fcdc23d2c032c25bde05d8cb3

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains text related to payment receipts, reinforcing the lure. The primary malicious URL identified is https://botokaw.ru/strik?utm_term=modelo+de+recibo+de+pago, which likely serves as a gateway to a phishing or malware distribution site.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 7

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://botokaw.ru/strik?utm_term=modelo+de+recibo+de+pago PDF link annotation
- https://cdn-cms.f-static.net/uploads/4417834/normal_60420cdf29dd3.pdfIn PDF document text
- https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/mowuxadujite.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413967/normal_600e5aa97f0ad.pdfIn PDF document text
- https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/lafokitobexo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490273/normal_603c4a6711d84.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4452206/normal_5fcaf53acef22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393514/normal_6047f5bd1bdf7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455405/normal_6021641dc0d32.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488336/normal_600bfe0109b5d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416792/normal_5ff8b5e2e361f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379987/normal_5fdf104d682b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449419/normal_6014c3da4608a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426676/normal_6005c1aaebe13.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420906/normal_5fd07f84f3881.pdfIn PDF document text
- https://pedigibija.weebly.com/uploads/1/3/1/8/131857049/tujulolesezo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419430/normal_5fd1803e945fa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379606/normal_5fdbe2b6ca290.pdfIn PDF document text
- https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/8693928.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417129/normal_600ad8f345d9a.pdfIn PDF document text
- https://widijusadapabi.weebly.com/uploads/1/3/0/9/130969823/93b979f815ae.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/8c7cbf32-5673-415d-814f-9721f59ed168/verizon_fios_customer_service_get_human.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db82c3d3-959c-48d2-9b98-b9a32bc338a7/sekisomefonu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c453e4c-1a7c-49d3-a038-303e2c5acfea/53151254838.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_off0000f587.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF587	5208 bytes
SHA-256: `9732567112ed315a9239e0539226180c347127c79bcb539fc6a7fe472c512f42`
`font_01_sfnt_off0001074a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1074A	1920 bytes
SHA-256: `218c11e7c3edafe47b3d6f41bc8bdfd7155aaae40b6737a353a719cb5551320f`
`font_02_sfnt_off00011071.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11071	12016 bytes
SHA-256: `e33932942765f46f960986ec2dc8582c60a45c8d0dd01599725b756c8b9cd873`

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