PDF malware analysis — malicious · ef3c09d0bb7586ac

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 23:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 97e5e7778575ae4b7a120d03ad35b676 SHA-1: 154194b0fd139b858f857a6d87b6dd12ff6a2f51 SHA-256: ef3c09d0bb7586acbb0106e4028f4beca12b02004620a6f06cfa677c8a224636

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to other PDFs. One prominent URL, 'https://traffking.ru/aws?utm_term=cats+casino+game', suggests a lure towards a casino game. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via the linked content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://traffking.ru/aws?utm_term=cats+casino+game
- https://cdn-cms.f-static.net/uploads/4420748/normal_5fb7b08cb80ad.pdf
- https://jesufapupu.weebly.com/uploads/1/3/4/7/134764637/2327691.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jefobexapulow/zodanofoja.pdf
- https://s3.amazonaws.com/guxosa/lang_leav_books.pdf
- https://s3.amazonaws.com/watajive/installation_guide_linux_cuda_toolkit_documentation.pdf
- https://s3.amazonaws.com/bokelur/65653488346.pdf
- https://uploads.strikinglycdn.com/files/a0c142b3-cf57-45cd-9475-b1c5c434552e/fojirafijo.pdf
- https://s3.amazonaws.com/juxatop/73309559605.pdf
- https://s3.amazonaws.com/tetofamuxulil/vobugavenitidoribifujit.pdf
- https://s3.amazonaws.com/regegozumekoza/72955657565.pdf
- https://s3.amazonaws.com/zetare/55083937261.pdf
- https://s3.amazonaws.com/matogapibelifiv/agenda_fiscal_2019_gratis.pdf
- https://s3.amazonaws.com/tadovu/vijuwuxedoza.pdf
- https://uploads.strikinglycdn.com/files/52972377-af1c-4b7d-a1a4-6abe35265165/94935611919.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_off0000c89c.bin` `2736ce2574958ecceb58e2254d23bf3174660a0a9272503d23e6de94acfe210a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC89C	4896 bytes
`font_01_sfnt_off0000d931.bin` `f40f2385a990b9129bf9b00dd6b588b63a5a5f27f090b5234d8a32c3a38fc0a3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD931	10592 bytes

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