PDF malware analysis — malicious · 39456054aafafb18

MALICIOUS

PDF

73.1 KB Created: 2021-01-06 14:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 9d93ceab98d2c70a338e670c45c05902 SHA-1: 352ed01e5f4a7e599e48855bd06bac6129dcc4ec SHA-256: 39456054aafafb186a9b94f665b99f60f1ab26860b75bc21cfaec7b853e87fcb

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 0.9995

Heuristics 4

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.
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/aws?utm_term=cell+structure+and+function+lesson+3+answers In PDF document text
- https://cdn.sqhk.co/gupukutolet/KPihEMd/44646583842.pdfIn PDF document text
- https://gaburidukir.weebly.com/uploads/1/3/4/4/134463400/kalepojob.pdfIn PDF document text
- https://cdn.sqhk.co/badaxiloru/Bhi95jd/top_100_station_radio.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4419003/normal_5ff0294c50ab6.pdfIn PDF document text
- https://mijibetifud.weebly.com/uploads/1/3/4/6/134653630/4c37c51872f7a.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/3c518917-4cf2-40dd-8a27-3068955245c2/pebinuvebefupugu.pdfIn PDF document text
- https://s3.amazonaws.com/fejenijovekozu/riwegekani.pdfIn PDF document text
- https://s3.amazonaws.com/dufekifaral/13068697385.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f009f801-71d6-47ae-bdda-77ed86c7c7e9/kidilimifu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1c0d385-632d-40c2-8da1-3f7a4b31f9a8/risazewufuvaxosu.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_off0000e506.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE506	5176 bytes
SHA-256: `7ee6b39e1624b51ddec02c60917fb898f8abb779a339efc80015280a7ac25b57`
`font_01_sfnt_off0000f6bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6BC	9712 bytes
SHA-256: `04224db97106b392c43309228807d063e28e9e71228fba42f0ce5062a59f6e8e`

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