PDF malware analysis — malicious · cf191896469c2d64

MALICIOUS

PDF

105.7 KB Created: 2021-02-22 13:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 14747275004e75700364728c93cefe51 SHA-1: ac57472ebec9e997b1b30aa1695cff3e509350b8 SHA-256: cf191896469c2d648f2d4c03de95dc9ebec0b097bbe76d2e464cb1b4ee46f23c

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 high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a malicious intent to redirect the user. No scripts were extracted from this sample.

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://seumenha.ru/strik?utm_term=what+is+the+earliest+known+civilization+in+north+america+jiskha PDF link annotation
- http://astropsychology.website/vavasajurelaqjhzz.pdfIn PDF document text
- https://cdn.sqhk.co/vuzefegevo/hgijieo/volume_booster_goodev_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/midijanere/LAgctja/63390456093.pdfIn PDF document text
- http://pannochki-art.com/birthday_candles_giftfa46.pdfIn PDF document text
- http://wuvaviw.iblogger.org/3703659384.pdfIn PDF document text
- https://cdn.sqhk.co/jarogofef/jdEizxW/the_avengers_destroyers_review.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/lebejos/canticuenticos_en_papel.pdfIn PDF document text
- http://pezakakalepovo.epizy.com/how_to_align_liftmaster_sensors.pdfIn PDF document text
- https://s3.amazonaws.com/dixaleko/bipesileji.pdfIn PDF document text
- http://retesatitogeli.epizy.com/schlage_connect_electronic_deadbolt_camelot_satin_nickel_-_be365_cam_619.pdfIn PDF document text
- https://s3.amazonaws.com/pibajuwi/73275404126.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_off00015fe7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15FE7	5396 bytes
SHA-256: `dff508abc9695ce6d965cb32d8e6b535491a4e0695aeaca72c7c40b871a11a78`
`font_01_sfnt_off00017234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17234	12196 bytes
SHA-256: `f428280e80d6b7afebaa7fcb2dbe55da669fe83776dca370ccb91b696538250e`

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