PDF malware analysis — malicious · a345b9ba1255af07

MALICIOUS

PDF

71.0 KB Created: 2020-11-13 18:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2a6994dcdcd8a03394bfcf7a666a1346 SHA-1: 5530111446dde71066446689ef031053b75b38d3 SHA-256: a345b9ba1255af076303a2eb6d7bc44125a7cb2b8c7440919263c05c1255cbf6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to Weebly-hosted PDF files, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malicious redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://traffnew.ru/123?utm_term=wash+sale+calculator
- https://jawifimubagibe.weebly.com/uploads/1/3/4/3/134310986/89ec4a0026ad8d.pdf
- https://jebezefekoju.weebly.com/uploads/1/3/4/7/134737834/gulif_xarikomaditesuv.pdf
- https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/gupuxanome-gegikik.pdf
- https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/nubape_misuzilug_tefodixo.pdf
- https://cdn-cms.f-static.net/uploads/4368998/normal_5f999b57cc71c.pdf
- https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/8e78c2c877d7.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/1104e383-2dc7-41ad-984a-483ece851ff9/tana_mongeau_nip_slip.pdf
- https://s3.amazonaws.com/zuxadol/tuninitulalotin.pdf
- https://uploads.strikinglycdn.com/files/0462b6f9-4663-4c32-9b1b-809e545b4fc4/66205909070.pdf
- https://uploads.strikinglycdn.com/files/0228c1d0-2f87-4a49-8946-8293a96d129c/mogufufogek.pdf
- https://uploads.strikinglycdn.com/files/5ecfb982-85e1-4b78-b376-204324c31066/zilafomas.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9b8.bin` `690427b33d3a6828b4c34fd568325c5710b226df56ff3e995c868a0f82343452`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9B8	4900 bytes
`font_01_sfnt_off0000ea68.bin` `67df0661c18875c55aea1b3d905f563638710e05d0ee9c561e22845bfbf6fe41`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA68	10744 bytes

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