PDF malware analysis — malicious · c38a6db355b6e92f

MALICIOUS

PDF

68.3 KB Created: 2020-11-24 07:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7e97f0a44c35988ac7c0819c35db4b32 SHA-1: d24bae5c2e33c2079a3745048298bf7917611556 SHA-256: c38a6db355b6e92f2e4ea7d2846599a0427428a3792823899916154c766f4de2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one critical heuristic identifying it as a potential link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically flagging it as a phishing trojan. The embedded URL points to a suspicious domain, likely serving as a lure for further malicious activity.

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://traffnew.ru/123?utm_term=light+platinum+guide
- https://cdn-cms.f-static.net/uploads/4448343/normal_5fab74e63f002.pdf
- https://kitovipafabezed.weebly.com/uploads/1/3/4/6/134600887/xipuf_wozebovep_viwipof_mugugitogugebe.pdf
- https://cdn-cms.f-static.net/uploads/4420588/normal_5f97cdf9a554a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/rotowan/79395136562.pdf
- https://s3.amazonaws.com/tejuvonixag/punctuation_practice_test_with_answers.pdf
- https://s3.amazonaws.com/ragejufa/psn_card_generator.pdf
- https://s3.amazonaws.com/gixirojozogufux/catamaran_optumrx_prior_authorization_form.pdf
- https://s3.amazonaws.com/dujepav/yds_adjective_clause_test.pdf
- https://s3.amazonaws.com/zukukelejurotef/subway_application_online.pdf
- https://s3.amazonaws.com/guxosa/xoxuvavelonodesidobenilim.pdf
- https://s3.amazonaws.com/jedadokuti/soxuveme.pdf
- https://s3.amazonaws.com/lakadutof/certificate_template_free_download.pdf
- https://s3.amazonaws.com/litunux/twa_corbies_theme.pdf
- https://s3.amazonaws.com/jumedemimo/44255043751.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_off0000cfc4.bin` `3a4f3d168eecd68a2e9e61a6cd6e221016bf1958f0468a52703f8711ce931b9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFC4	5040 bytes
`font_01_sfnt_off0000e0c9.bin` `43ceedf1c52fe561be954e18cc2fce85136f3b45f41ea79590ec06891eb578bd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0C9	10420 bytes

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