PDF malware analysis — malicious · e4ca1a2989bf9ae8

MALICIOUS

PDF

87.9 KB Created: 2021-03-20 23:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 60f425db18bd52a3a1b6e72ba8761ca3 SHA-1: 59ccefa0a3ec4747ee6e3ed1168c4f679cc46da9 SHA-256: e4ca1a2989bf9ae89205e3f6509957c97f22bc5f3a80d7ab9385bf551020a8b3

164 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 embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://leonvi.ru/123?utm_term=indesign+template+free+cv PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369901/normal_602c21a189823.pdfIn PDF document text
- https://cdn.sqhk.co/jenireni/d4yigpJ/retired_clergy_housing_allowance_worksheet.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485705/normal_6044c654cbc1a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461767/normal_5fee6234d2b65.pdfIn PDF document text
- https://cdn.sqhk.co/givogaduta/hfSjbib/snipers_vs_thieves_codes.pdfIn PDF document text
- https://cdn.sqhk.co/mugapowejog/aiiWpPr/talking_kitty_cat_youtube_guy.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450896/normal_6022356c3a0c2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500665/normal_604f3ed2ce308.pdfIn PDF document text
- https://cdn.sqhk.co/fasuzozo/gf6ighc/36009632050.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369173/normal_601486165be1c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495034/normal_600c7391c775e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494139/normal_60395cef397fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420441/normal_6040c0e288481.pdfIn PDF document text
- https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449399/normal_5ff8b4e67d1f6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365635/normal_60092ca8f2d55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461495/normal_600a0400cf31e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_9bc9080822684ba8911462333169cd93.pdf?index=trueIn PDF document text
- https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_32ce40887fe94f379a7506c62e2c5fa8.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/7876b7f2-0f89-445d-a590-3494244c1013/the_raven_by_edgar_allan_poe_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e01127c-be5d-407c-8847-37a5ae27f77d/86094170133.pdfIn PDF document text
- https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_c0ac0ed6ef074f2db8c241173152e867.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/9fc9ab0d-55c3-4733-8542-f4b833d8cc94/jevigowug.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bec48ac2-e5f3-4a0a-bab2-7cd89150677e/78978236540.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010d10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D10	5152 bytes
SHA-256: `eed05b729540716b4f43847d51c2a5a5541f975cc54b99eda0fc73dc913a0f83`
`font_01_sfnt_off00011e79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E79	10928 bytes
SHA-256: `c1e1e800fa1235ec5f6fd6c919f2dd34ac75b80d0409bc3e3321013a82eb65d8`
`font_02_sfnt_off000143a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143A6	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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