PDF malware analysis — malicious · 8b979ad4b544cf57

MALICIOUS

PDF

83.3 KB Created: 2021-05-20 21:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: a74613159e67ad51c377d2a3c7247430 SHA-1: 39f6fa1d9fb70df0e4971db368dc9d7a1cb80d00 SHA-256: 8b979ad4b544cf57b09ae232d994ca9778235a32ebdef7b0d86d7e960ad342c0

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external PDF files hosted on disposable domains, with a primary lure related to movie downloads. The presence of embedded URLs and the structure suggest an attempt to drive traffic to potentially malicious or phishing 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://soxebez.ru/strik?utm_term=telugu+new+movie+download+2016+mp4+avi+3gp PDF link annotation
- https://static.s123-cdn-static.com/uploads/4456391/normal_6004f04a5663a.pdfIn PDF document text
- https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/5f7949cb9fbe39a.pdfIn PDF document text
- https://wifovusu.weebly.com/uploads/1/3/4/3/134312249/dajonapexexom.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486983/normal_5fcaa1a65312c.pdfIn PDF document text
- https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/jibejusobujuxup-gitolaku.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415944/normal_6061036c7ed7c.pdfIn PDF document text
- https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/wivejewukogiv.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492240/normal_60387a0e20a76.pdfIn PDF document text
- https://wuxuvekukiku.weebly.com/uploads/1/3/1/3/131380251/juxuwixirepira.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449779/normal_5ff3822173268.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495042/normal_6026a3f5ded18.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4462379/normal_5fc7657227334.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452862/normal_605913d13a216.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388827/normal_6032d3b001cb4.pdfIn PDF document text
- https://gufogejerujog.weebly.com/uploads/1/3/1/4/131406717/wulib.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/632a6834-f97c-463c-ab14-ca341b4672f4/girl_with_the_dragon_tattoo_swedish_trailer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/298811c4-9749-4135-ba63-139bf4e3cc16/rovavapeli.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a998c984-1095-49e1-aed7-195d5e6244ed/audi_s4_avant_review_uk.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_off0000ed0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED0D	4612 bytes
SHA-256: `4e2b62a4e59241bc4f8637128a23a9f34b8a043be7092fd64f5e3738c89c4421`
`font_01_sfnt_off0000fd5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD5C	5840 bytes
SHA-256: `29a73980af5d9a78b7085faaf2b0613b80cf6c22c8d19066f8ca30a932365027`
`font_02_sfnt_off0001114e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1114E	14516 bytes
SHA-256: `b540740ec726c71e3542dbfaa4f3886f46642f7ecf00a74a8890493ac3e7a46b`

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