PDF malware analysis — malicious · 837ae9fcb88e1a5f

MALICIOUS

PDF

63.5 KB Created: 2020-12-28 08:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 457fdff4a7fb1b5eed7e01043bec7ca7 SHA-1: db2f60bca6aba8eff4a5b5f6e8b29e5cfe36ca86 SHA-256: 837ae9fcb88e1a5f408f4be3776b2b74acb076dfece3c36887a2c1ad46d18bad

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL and document body content suggest a lure to download a "freekick world championship apk", indicating a social engineering tactic to trick the user into downloading malware. No scripts were extracted, but the PDF structure itself facilitated the malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://trafffe.ru/strik?utm_term=freekick+world+championship+apk PDF link annotation
- https://cdn.sqhk.co/dodazija/VmZJrGd/fashion_week_hair_stylist_jobs_2020.pdfIn PDF document text
- https://cdn.sqhk.co/wewuxujudu/i5chhhi/best_cnc_simulator_online.pdfIn PDF document text
- https://cdn.sqhk.co/kedilexele/tW0iahe/seniledun.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/00c023c6-9f8d-4960-bf74-b884c0ce82b1/vovexorimovabe.pdfIn PDF document text
- https://s3.amazonaws.com/pazifetanegapu/vatican_ii.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5f1edc70-a665-4dd4-aa8b-301d867ed031/watujew.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b39b25b-78d7-4663-be38-18808f060dab/dirakarugumukutugobizelo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b5e38462-b904-4cd0-aee5-dfd1003d891b/tijadatabidisudug.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/77852622-c523-4de6-a303-6804046cea25/19786256676.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ff5db352-045b-4431-9364-ae99d2571826/mapojulutovamigulegarusob.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bbb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBB3	5424 bytes
SHA-256: `09db1294eb0258e3d50d5b3f293f1ddb6c13f8b7bf8dad23fa77ba74a7aca9ea`
`font_01_sfnt_off0000ce0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE0D	10332 bytes
SHA-256: `9f3437dd86c3eb4548a0de2946c84cefa85a304624fbb1e4caf82e58c50a8312`

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