PDF malware analysis — malicious · 1839cf8504581fd5

MALICIOUS

PDF

79.5 KB Created: 2021-03-16 00:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 74f3ae0d8ddcd7f59db43af9686af36a SHA-1: e65f4df7c921de1732aa3b656285366328a296d7 SHA-256: 1839cf8504581fd5f8407bdcdf08b11da013af03c5628e6d37e0a17ac1e123da

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'building across time'. No scripts were extracted, but the PDF structure and heuristics suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=building+across+time+pdf
- https://cdn.sqhk.co/wusakituzu/9Aic6gi/like_a_boss_meme_song_download.pdf
- http://pelilizujav.22web.org/how_to_learn_medieval_sword_fighting.pdf
- http://lumacy.site/87628324583q4slv.pdf
- https://cdn.sqhk.co/jekidase/3mng4yN/zong_free_internet_check_code.pdf
- http://mobile-media.moscow/wosipepenaroiwz1r.pdf
- http://alfa-quest.ru/kavireqw5h4.pdf
- http://goproonly.com/79509617583yp2ha.pdf
- https://cdn.sqhk.co/kikepedu/icgh6ic/guide_for_whack_your_boss_with_superpowers_box10.pdf
- https://cdn.sqhk.co/nebuwaxisiw/shdgfic/forest_survival_games_online.pdf
- http://supportcopyright.net/hp_probook_6570b_drivers_download_windows_7yfutx.pdf
- http://befujukipepejem.mygamesonline.org/79402183054.pdf
- https://cdn.sqhk.co/zugivakizo/e3KjgPR/zuwokiwogomokofef.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/xiwevitox/nijewujirufigedajam.pdf
- https://s3.amazonaws.com/tixeligufokup/digital_marketing_journal.pdf
- http://segalemu.epizy.com/cyanogenmod_gapps_4._2_2.pdf
- https://s3.amazonaws.com/rudelazifizuvo/84837528551.pdf
- http://zukevajisuw.rf.gd/drug_driving_offences_sentencing_guidelines.pdf
- http://sifuveje.rf.gd/flange_ansi_b16_5.pdf
- http://fazaburifug.myartsonline.com/tatur.pdf
- http://wegorabeg.atwebpages.com/64081221391.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_off0000f807.bin` `33c71bbf0d9f5c19f11017563545ff0f8cd8005c021558f4e8b1690b0279090a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF807	5524 bytes
`font_01_sfnt_off00010ac0.bin` `98bc7e9bab936c7d212590f31bee23caf703146a4d81885495db9873e9ccbba3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AC0	11384 bytes

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