PDF malware analysis — malicious · 8d90bfdb4fc44f31

MALICIOUS

PDF

98.5 KB Created: 2020-12-30 11:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: a707a363656f2e80751c601fbae8f260 SHA-1: 9efffb9eb63df32ea0f5284a89c18dc9b2d1876b SHA-256: 8d90bfdb4fc44f31f61aba60a1b8e9757bd04fe15722571cd4717b221fbd676a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure for 'Chain chronicle apk 3.8.26' and embeds multiple external links, one of which, 'https://traffset.ru/123?utm_term=chain+chronicle+apk+3.8.26', is flagged as malicious. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a phishing or malicious redirection attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=chain+chronicle+apk+3.8.26 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4464077/normal_5fa21e046afd9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365551/normal_5fdda0cb95852.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473651/normal_5fe8b9d11cb2a.pdfIn PDF document text
- https://zokilare.weebly.com/uploads/1/3/4/7/134767859/078dcf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371788/normal_5fe77cf2350ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470040/normal_5fafd34e0571e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379612/normal_5f8cb28662131.pdfIn PDF document text
- https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/3589450.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371799/normal_5fa4242040abd.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/0e390fcd-8a3d-4eb4-aed4-5a14cb4a0295/starfinder_spell_gem.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/948ea677-80f4-42ee-bf8b-540be0bb29dc/32995499043.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/41dcccd8-11de-44d4-9bd6-7db9c98b9f76/hitman_sniper_assassin_sapienza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/63d1fb6d-f6d0-4e5f-b1cb-b1a976109293/sivijadel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e7c532a-1992-4246-ab47-ffe05d6d6ed7/gender_race_and_class_in_media_5th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/253f228f-85e2-40ad-89bc-071f175fb61b/51506054078.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_off00010410.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10410	15992 bytes
SHA-256: `0310a72775bc493fde09d5067cc1f84c309e827e04636732598282196edbfaa7`
`font_01_sfnt_off00013776.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13776	5488 bytes
SHA-256: `99ce356b07dd50a0685682245cb01d6c488e9093e4b32596efc2bac523894122`
`font_02_sfnt_off00014a12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A12	14168 bytes
SHA-256: `34b1ba61061403d6c93955b6960c3f0443839e9d97e29ecdbfd10a16fc009841`

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