PDF malware analysis — malicious · f1397d860a5bbbea

MALICIOUS

PDF

69.7 KB Created: 2021-01-24 19:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 64853f78af057cdc51cae7941bfde56d SHA-1: d3f3176f02231e1eb797878bd27a27fff43f019e SHA-256: f1397d860a5bbbeaae497592bcf28045143a65103300a2001f76b74ae12b88df

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=gel+wrist+rest+for+keyboard PDF link annotation
- http://glawerry.online/chess_master_gameboy1l81d.pdfIn PDF document text
- http://lessonsonline.site/big_bang_theory_season_12_dvd2bajw.pdfIn PDF document text
- https://cdn.sqhk.co/pogezasamu/iU6ihNx/wwe_universe_mode_online.pdfIn PDF document text
- http://klossheff.xyz/gibezatur0dt9.pdfIn PDF document text
- http://dwatches.site/12643964162y8b80.pdfIn PDF document text
- http://silkhfig.bid/53913012452xc8jw.pdfIn PDF document text
- http://table-wait.com/mejibebebodh470.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rorives/cultural_anthropology_definition.pdfIn PDF document text
- https://s3.amazonaws.com/dabatisew/abdul_kalam_quotes_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/nuxomigo/66178474799.pdfIn PDF document text
- http://luwusifijusu.rf.gd/appendicular_plastron.pdfIn PDF document text
- https://s3.amazonaws.com/sajatesawodiji/cozy_house_collection_sheets.pdfIn PDF document text
- https://s3.amazonaws.com/lerezazo/chapter_13_budget_worksheet.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_off0000d22b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD22B	5332 bytes
SHA-256: `0418353199227c0ecf699c20757f9dc6e2c84161187b509b59c40046eeca2637`
`font_01_sfnt_off0000e476.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE476	11108 bytes
SHA-256: `63e0dc47fe459ac6fdb1618dddb42751f95db079446a9b71c322419206784165`

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