PDF malware analysis — malicious · 6d79121e42c062c2

MALICIOUS

PDF

113.4 KB Created: 2020-12-24 15:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 73dba826c35aa9744e8f31e8ec06c7ef SHA-1: 9d3948b5db9a997167a8a807b2e43fe7a15793f6 SHA-256: 6d79121e42c062c26fc3af47b465e344d5c9b7d957806ef7e0837b6ccb9cfd31

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to suspicious domains, and the document body, though heavily obfuscated, suggests a lure related to 'random facts'.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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/strik?utm_term=random+facts+you+didn%2527+t+want+to+know PDF link annotation
- https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/9b130643da1a.pdfIn PDF document text
- https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/bisifitisaj_jedemitisakebe_fefuzadisaro_ditodozabumi.pdfIn PDF document text
- https://tumupapixukuju.weebly.com/uploads/1/3/4/8/134852222/xalugovadeduk-kawukazilebe-sorururaken-jofuvoxexelipu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375890/normal_5f9283c37fa71.pdfIn PDF document text
- https://satewode.weebly.com/uploads/1/3/1/4/131407014/05c87bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368767/normal_5f8845c66204f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380226/normal_5fc2820f93f22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378160/normal_5fa23be9e9bf4.pdfIn PDF document text
- https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380079/normal_5f8d38c2b078e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470387/normal_5faef7ab54733.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://s3.amazonaws.com/ravuxudibure/89524468766.pdfIn PDF document text
- https://s3.amazonaws.com/sorapobuk/fajebemokizomi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2b171c8c-6761-4963-a148-18fadb5f3336/89186223321.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3f336010-950c-4657-8052-4e7dcf0e3909/blue_tiger_headset_warranty.pdfIn PDF document text
- https://s3.amazonaws.com/xefejevife/beaumarchais_le_barbier_de_sville.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00015b47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15B47	5104 bytes
SHA-256: `52e5e80059e05f0842c6bb4f99d90608afc8ff7125297a16adcc847b3879f8e2`
`font_01_sfnt_off00016cb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16CB1	11164 bytes
SHA-256: `2e603e9b6cead98f0beb54a1fbdd6d5e7d37dd42ad4550d80b02f103f4c6963e`
`font_02_sfnt_off0001926e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1926E	16176 bytes
SHA-256: `71b322a9652601b97f32e152f367505deae60c3b427f3683b36fce26c94719f6`
`font_03_sfnt_off0001a78f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A78F	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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