PDF malware analysis — malicious · ee18a787838f6250

MALICIOUS

PDF

85.2 KB Created: 2021-03-01 06:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 8c019baffadaf7d763106276953d26e2 SHA-1: 41e834ae7bad1760af0c0906d129e7465e4f4853 SHA-256: ee18a787838f6250f2c0b4a558bd98f19957e7d33eecdc90623408553f969b09

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many pointing to disposable hosting services and redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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 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://dafemum.ru/wix?keyword=permutation+problems+worksheet+with+solutions In PDF document text
- https://cdn.sqhk.co/nuduniguwufo/vtjc2hh/uncertainty_definition_science.pdfIn PDF document text
- https://cdn.sqhk.co/lupokuna/j4bjj7W/wheels_on_the_bus_song_for_kids.pdfIn PDF document text
- http://jekefidaz.mygamesonline.org/2018_ap_calc_ab_frq_2.pdfIn PDF document text
- http://miwasigal.mywebcommunity.org/tekudorirogofeto.pdfIn PDF document text
- https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/widomitip.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474448/normal_5feba3457f22d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468537/normal_600d6ac80f2ff.pdfIn PDF document text
- https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/fuzepuluwijer_kowedidezebu_zoniguvisulu_xuzefowofari.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421615/normal_5fff510a5606b.pdfIn PDF document text
- https://buzelobuledu.weebly.com/uploads/1/3/1/3/131397981/77db3691d137a94.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495037/normal_600bb9b1aa31a.pdfIn PDF document text
- https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/folebad.pdfIn PDF document text
- http://kanaxade.mygamesonline.org/65239417402.pdfIn PDF document text
- http://gagimubu.mywebcommunity.org/paburofogadu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411702/normal_601b454e0194a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426280/normal_603969e85abc9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454167/normal_5fd17a899d84e.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
- 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_off0000e122.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE122	5236 bytes
SHA-256: `4758c36fc884d64bed652ff8f67131bf31f5757dd5ba9cef1a82b7d4560e9221`
`font_01_sfnt_off0000f2bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2BD	15544 bytes
SHA-256: `8c7040315cfe5338471eec5046608f0a538773d83b14af1d3b787e9c0f2a5eb0`
`font_02_sfnt_off00012407.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12407	16088 bytes
SHA-256: `6de16bda46bf1ec27efab41bedc3b09f8a96b8c9eecd7f9fd664686069ca382f`
`font_03_sfnt_off000138c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138C1	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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