PDF malware analysis — malicious · 1b23be443d569da6

MALICIOUS

PDF

81.9 KB Created: 2021-01-22 03:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 66cbffeca9a6a8d4e031815200c8c14c SHA-1: 2eb2bbf6967f9a8eb2abb414e0ff40af2f11c158 SHA-256: 1b23be443d569da64dcd6cd4a0eacd76e47141c23530c7649e0ec17d32c15a31

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm for SEO manipulation. One critical heuristic indicates a link to known malicious redirector infrastructure. While no scripts were extracted, the presence of numerous external links suggests a potential for redirecting users to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/123?utm_term=baby+trend+expedition+lx In PDF document text
- https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/xoselizaxuxi-litovowiwebese-zitelufo.pdfIn PDF document text
- https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/6174766.pdfIn PDF document text
- https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/ledotefulolifatesub.pdfIn PDF document text
- https://pakopigame.weebly.com/uploads/1/3/0/7/130738837/2074563.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422909/normal_5ffcc80458e17.pdfIn PDF document text
- https://sekatuxu.weebly.com/uploads/1/3/4/8/134894727/7589755a0.pdfIn PDF document text
- https://tusubolamofe.weebly.com/uploads/1/3/5/3/135322079/lamat.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423430/normal_5fd1e04121526.pdfIn PDF document text
- http://detomebokiv.iblogger.org/14875925727.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402944/normal_5fe2143284b86.pdfIn PDF document text
- https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/cc25bc1c049ec39.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496586/normal_5fcc536057b15.pdfIn PDF document text
- https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/konejivudujow.pdfIn PDF document text
- https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/fbe981bff2.pdfIn PDF document text
- https://naratejog.weebly.com/uploads/1/3/2/6/132682615/0d31c0353330e.pdfIn PDF document text
- https://monemoret.weebly.com/uploads/1/3/4/6/134667898/9fe0e1d7c67.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://jetiloguj.rf.gd/zesikubofir.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_off0000f6b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6B3	4924 bytes
SHA-256: `076fbfed8d542c8883ea6cd13367a7147a9877718a3c0307c90725453c55f071`
`font_01_sfnt_off00010779.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10779	10840 bytes
SHA-256: `38c9cc617829a5a55c481cf7c89dc760f4cf66966f0bf8f30959625fcbfe407e`
`font_02_sfnt_off00012c5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C5D	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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