PDF malware analysis — malicious · f7267f6db395e571

MALICIOUS

PDF

87.5 KB Created: 2021-02-04 05:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: ad1c5f620400121628f8561910f99f93 SHA-1: 65f2cf05dc2e139f7523d08c5af2bd3fc7d04f6b SHA-256: f7267f6db395e571ba2302685652b86bc5999f5214bca842bfeac1b63c433107

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM', and an embedded URL pointing to 'jottigo.ru'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/aws?utm_term=sample+spreadsheet+free PDF link annotation
- https://static.s123-cdn-static.com/uploads/4376869/normal_5ffd6361343e9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491148/normal_5fccabb741515.pdfIn PDF document text
- https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/nupitejupune.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374545/normal_5ffcbab757cbc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406482/normal_600ce4df1ae56.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483082/normal_6012c007705e7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4458839/normal_5ff60b355df49.pdfIn PDF document text
- https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/5792378.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444626/normal_5fe29539c0c3d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4492593/normal_60027f2c65317.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450907/normal_6002dc7c80a1e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://misopipe.rf.gd/best_android_games_of_all_time_paid.pdfIn PDF document text
- http://bepinutarefe.rf.gd/mulubuminijazawoba.pdfIn PDF document text
- http://kafogateginoni.epizy.com/kapoxosivadud.pdfIn PDF document text
- http://bojefej.epizy.com/67666078129.pdfIn PDF document text
- http://juwelaloz.epizy.com/basic_tactics_for_listening_3rd_edition.pdfIn PDF document text
- http://lekekavom.epizy.com/zupokileg.pdfIn PDF document text
- http://fesemuk.rf.gd/68091618964.pdfIn PDF document text
- http://gegawuwiru.epizy.com/arista_sfp_10g_sr_datasheet.pdfIn PDF document text
- http://nonavijewiw.epizy.com/813818808.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
- http://www.gnu.org/licenses/gpl.htmlIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e746.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE746	4908 bytes
SHA-256: `ab375451252ac0ae77325221ddb46a7f9f985b0b135034de60f03f93bfd80d4c`
`font_01_sfnt_off0000f7dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7DC	6068 bytes
SHA-256: `58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717`
`font_02_sfnt_off0001078d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1078D	10588 bytes
SHA-256: `fd21b90c1c2c86888614b26ac01ee3f26113b3f85351fac77f1e6b5e634a2634`
`font_03_sfnt_off00012c1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C1F	16312 bytes
SHA-256: `bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939`
`font_04_sfnt_off000141aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141AA	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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