PDF malware analysis — malicious · 9a949ab5a3f558ed

MALICIOUS

PDF

75.5 KB Created: 2021-03-29 02:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 177ab8f033f72eb5191ca98e6432fe06 SHA-1: df325c5644443d6acd989c79d30ffc58a83183be SHA-256: 9a949ab5a3f558edfe6184dd8f216d4a84fcfde54021873b81d74ae14ce01058

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Numero atomico definicion pdf', suggesting a pretext for the user to click the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jacksth.ru/award?keyword=numero+atomico+definicion+pdf
- http://zakukat.iblogger.org/83223761386.pdf
- http://vuzitofakomuj.22web.org/arma_3_sp_missions.pdf
- http://labakugolav.iblogger.org/major_themes_in_house_on_mango_street.pdf
- http://kujubawakini.22web.org/jigegepodujezariw.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/e7500025-514e-4f13-a42d-500150beda86/bulevijudewabalubepof.pdf
- http://vowaxuf.rf.gd/strawberry_smoothie_recipe_with_yogurt_and_orange_juice.pdf
- https://uploads.strikinglycdn.com/files/6038c48a-0a44-4f97-87ae-6b27220feda3/81261541268.pdf
- http://zepizokuxufo.rf.gd/finojuvul.pdf
- http://teruwizirazi.rf.gd/38452141291.pdf
- https://s3.amazonaws.com/fekaduvopigab/93754175744.pdf
- https://s3.amazonaws.com/fexuror/29785425326.pdf
- https://uploads.strikinglycdn.com/files/d489f130-e5cb-485a-92c5-0853a2147f85/44930734791.pdf
- http://sujidise.epizy.com/account_receivable_turnover_ratio.pdf
- https://s3.amazonaws.com/wezukep/chosen_hill_sixth_form_prospectus.pdf
- http://wusozugidiwe.rf.gd/add_add_in_to_word.pdf
- http://xusoloturokuk.epizy.com/9158463970.pdf
- http://lenutan.rf.gd/rizakegulototadiko.pdf
- https://uploads.strikinglycdn.com/files/cf660186-134b-454b-adf0-431296a3fe1a/16935849987.pdf
- https://s3.amazonaws.com/lebaxa/how_to_turn_ratios_into_decimals.pdf
- https://uploads.strikinglycdn.com/files/2b6e20ec-f71b-459c-b75b-5a7b9718f295/govebolomobe.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e7c6.bin` `9dc1774cee2215b8e20dd7741129baa109cb9f964e5609e6fe4c8c16ea1badce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C6	5060 bytes
`font_01_sfnt_off0000f8ef.bin` `e57790bbbd7ac37d77aa1136ce631c04da8b6ffb349802926edeb435ba30a2c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8EF	11784 bytes

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