PDF malware analysis — malicious · bd7bde586b41c36d

MALICIOUS

PDF

63.8 KB Created: 2021-01-14 16:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: f2fb4dda34c5895d4800d22f803e532b SHA-1: 6e3cd60747400de104e16b33b3d151a775325156 SHA-256: bd7bde586b41c36dfa8ecd1f9de7b5d17f29125fbed1e25551dd71a95f836f91

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=his+helping+hands+food+pantry'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a food pantry. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

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://cctraff.ru/123?utm_term=his+helping+hands+food+pantry In PDF document text
- https://static.s123-cdn-static.com/uploads/4411691/normal_5ff29cfc8f5ab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450864/normal_5fecfe7469550.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457868/normal_5fb8e6347eceb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446034/normal_5fa65221e4a54.pdfIn PDF document text
- https://site-1245131.mozfiles.com/files/1245131/54647059539.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389794/normal_5f9511fc92842.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465394/normal_5fe8410d7c5b2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/xaliwalufoguni/windows_defender_security_center.pdfIn PDF document text
- https://s3.amazonaws.com/dutuzanob/wewuge.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_off0000be20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE20	5368 bytes
SHA-256: `77b2bf37c1ad13247a424de967088c3201d790d836784b954c065454d14bab1a`
`font_01_sfnt_off0000d063.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD063	10068 bytes
SHA-256: `ee18ff3af66c515822c20a4bab891a3446911664689a72154d260e908ec0bdd1`

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