PDF malware analysis — malicious · 88a58f525b2cbba9

MALICIOUS

PDF

83.2 KB Created: 2021-01-17 12:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03

MD5: 726fdc34f19c57ea1e8c4f28ffe56ae2 SHA-1: 37eb04a72e7279dabb80a324f342ba841733f992 SHA-256: 88a58f525b2cbba9ede573b504dbd1a00c259305304ee9eebc5191c5a187ac50

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure and disposable hosting sites, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to animal pictures.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/aws?utm_term=animals+pictures+with+names+and+information In PDF document text
- https://static.s123-cdn-static.com/uploads/4390374/normal_5ff84457ef53e.pdfIn PDF document text
- https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/21e58eef4a141.pdfIn PDF document text
- https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/bojezokewuvimib.pdfIn PDF document text
- https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/122016.pdfIn PDF document text
- https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/welev.pdfIn PDF document text
- https://beweluka.weebly.com/uploads/1/3/4/6/134694692/275410.pdfIn PDF document text
- https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/welakejes.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368991/normal_5fdb97b5ea61a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413225/normal_5fd2acb59c8fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417024/normal_5fb751aebcfeb.pdfIn PDF document text
- https://site-1166598.mozfiles.com/files/1166598/40118687532.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481275/normal_5fc54dbc182a2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475406/normal_5fba87e85321f.pdfIn PDF document text
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
- https://site-1172843.mozfiles.com/files/1172843/age_of_empire_for_android_mobile.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420459/normal_5fd7cf7a6928b.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD38	5476 bytes
SHA-256: `fa0a1751d0c7acb876172138a87a56f07b678b01dfbabd1d1ca0fff7a4566d28`
`font_01_sfnt_off0000efb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB1	5060 bytes
SHA-256: `30543e1d03ce419f723f2642ca913af61c4b27cb936f01c44632986d6eea3328`
`font_02_sfnt_off00010215.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10215	10872 bytes
SHA-256: `3c0c9c8d89db5be5f1b0ff09208125c57be3f93ea1d3d0219725ee2ef7f6f968`
`font_03_sfnt_off00012750.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12750	16760 bytes
SHA-256: `86ceb48472def90ca55d0ecff0fc5a3583c96043ee8052610589ebaad1a2ba96`

Open this report in the interactive analyzer, or submit your own file for analysis.