PDF malware analysis — malicious · 734f9b4a93d44175

MALICIOUS

PDF

143.8 KB Created: 2021-05-19 21:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: e7f49af46ab997f14eb96e83010e93f2 SHA-1: 7485ae209b79a5ae0e0055484543a9de3b361c27 SHA-256: 734f9b4a93d4417577ea106b8f65343e780c51df0bcd87ac09d171322fb9e5e2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The primary malicious URL identified is 'https://pelibifir.ru/strik?utm_term=libro+gestion+de+personas+miquel+porret+pdf', which is likely used to redirect users to a malicious site. The presence of PDF_SEO_LINK_FARM heuristic and ClamAV detection further supports its malicious nature, indicating it's a phishing or trojan delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 5

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.
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://pelibifir.ru/strik?utm_term=libro+gestion+de+personas+miquel+porret+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4490934/normal_5ff1cd892d1aa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473035/normal_5ff64db7a1fbb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4455399/normal_5fed20508bfc0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426687/normal_603a92e0df003.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379852/normal_601966c2772f9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4419415/normal_5ff3fdd6afe85.pdfIn PDF document text
- https://gepopoxano.weebly.com/uploads/1/3/4/6/134663556/254822615.pdfIn PDF document text
- https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/8231326.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412570/normal_604206001d759.pdfIn PDF document text
- https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/502ff758f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422627/normal_6036d1dc3293d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412902/normal_5ff687a08a3c3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455884/normal_601537d803563.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/a4dcfcf0-6fb5-4f05-9e5b-d8f7eb4016ef/regibidiraxutasol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/923d7b0c-f460-48f2-86d4-c41f9736fb9e/42754051445.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43d6cd7a-2247-4f4f-9668-f54de4c05a61/how_fast_is_a_rzr_170.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4e76d07-caa0-4226-8dfd-78d399370a49/nixon_watch_battery_size_51-30.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bcfdedc-43b3-4cba-9ed5-dd39ac1ec78c/rojezaz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/873cbb6e-7177-45d2-a3ae-d83150cf1b1d/69400005013.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d548055-c440-4db3-8370-47112c4a7dc6/dolores_cannon_books_for_sale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/99fee380-7a6a-47d3-adda-fdd2bfe60919/diginigo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0310ca83-4b17-4a0d-bd09-d1429526cd33/how_to_simplify_the_expression_with_exponents.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001e0e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E0E9	5568 bytes
SHA-256: `8257c3307cca0f9f5acc471857fa81da0c64e7f280ca9ca411e2e04141846044`
`font_01_sfnt_off0001f3bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F3BB	12508 bytes
SHA-256: `0bebcc54f8222f60eef71f745096fb1c89b1bfd163d7357171bbb04d9decc916`
`font_02_sfnt_off00021ba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21BA8	16204 bytes
SHA-256: `c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449`

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