PDF malware analysis — malicious · 436ecada16adff81

MALICIOUS

PDF

69.1 KB Created: 2020-11-11 06:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 2c728f26a641d63f098a536216291a85 SHA-1: 5395ed8a58a675fe93ce260345a00517470de9c9 SHA-256: 436ecada16adff81084d6bf2429a118569ed9d633e9d672fbf126c7baaedcdb4

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://ggtraff.ru/123?keyword=daniel+duvall+prayers In PDF document text
- https://cdn-cms.f-static.net/uploads/4367622/normal_5f98ddd771fac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372384/normal_5f9531e29ba7f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422631/normal_5f997a67a62cd.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/60126974-f991-42a2-92dc-f9950ee026cc/99057358435.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b14c2cb8-3e31-4cf1-a19d-20173382d175/24263940294.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/xejuwelobun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/33e6cb25-5346-4ac7-856a-4c2d73b53b5c/13649734804.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/82a4132a-84ba-4238-98e1-0a500c5ef905/30204317461.pdfIn PDF document text
- https://s3.amazonaws.com/sabegokek/nitezesikanogugujugepi.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d30f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD30F	5116 bytes
SHA-256: `b6b7a84ad764cee789b781d49de62ec1cc1847cf1fd4f827fdb4b899efe1d470`
`font_01_sfnt_off0000e49c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE49C	10552 bytes
SHA-256: `1a58fe3aa83f9b77ae924a42b6ca6300eabbdb44185f0165f3bc9accd1e46150`

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