PDF malware analysis — malicious · a81299a2af522185

MALICIOUS

PDF

103.4 KB Created: 2021-03-26 10:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: d59788440a7b1535ebe914fe6edadaf7 SHA-1: 7bac41e419c118ffb745da44d18695711510f9b6 SHA-256: a81299a2af52218545639a26f9aafc858c06dc86e9477d352d78425f690c7ba8

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains numerous external links, indicative of a link farm or phishing lure, as highlighted by the PDF_SEO_LINK_FARM heuristic. The SE_BROWSER_INSTALL_LURE heuristic suggests the document prompts the user to install a browser extension or update, a common tactic for credential theft or malware installation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://zajinet.ru/123?utm_term=certificate+of+analysis+fda+template PDF link annotation
- http://idealica-columbia.site/divinity_original_sin_guidex4fem.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452626/normal_6041854edd569.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486983/normal_603c6e59f1601.pdfIn PDF document text
- https://cdn.sqhk.co/jirudumom/ghjlUCE/cowboy_caviar_recipe_pioneer_woman.pdfIn PDF document text
- http://se-mrush.com/what_is_the_story_of_lady_windermeres_fankm9w7.pdfIn PDF document text
- http://bristol-yalta.run/vlookup_excel_in_2_sheets7b1q1.pdfIn PDF document text
- https://savibivo.weebly.com/uploads/1/3/1/3/131381036/xojuwamukomoj-xetipelevike-ponegufiz.pdfIn PDF document text
- http://soldatskaya6.ru/how_much_to_fix_a_priusjj8rr.pdfIn PDF document text
- https://cdn.sqhk.co/kasavakujosi/jjiibw6/storybeat_pro_premium_apk.pdfIn PDF document text
- https://fegafedanopi.weebly.com/uploads/1/3/4/3/134311678/8bfd5525986.pdfIn PDF document text
- https://cdn.sqhk.co/weteroliwo/Djheeiw/truck_racing_driver_truck_simulator_2.pdfIn PDF document text
- http://reduslim-official.website/atividade_epileptiforme_o_que_significareofd.pdfIn PDF document text
- https://cdn.sqhk.co/zolewiko/id6jfhi/61504808930.pdfIn PDF document text
- http://damvglaz0.xyz/how_to_make_a_smoothie_with_frozen_fruit_yogurt_and_milkzr37p.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384150/normal_6018d15879548.pdfIn PDF document text
- http://topstop.site/22503146532xc0.pdfIn PDF document text
- https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405946/normal_5fcaa4b1ed9b0.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/wopari/generic_audio_driver_for_windows_10_64_bit_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/zoromexemuzid/28586580176.pdfIn PDF document text
- https://s3.amazonaws.com/zonivezada/wizkid_omalicha_music.pdfIn PDF document text
- https://s3.amazonaws.com/mujesogi/dna_replication_coloring_12.2_worksheet_answers.pdfIn PDF document text
- https://s3.amazonaws.com/womirofop/basic_html_tags.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014ebe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14EBE	2828 bytes
SHA-256: `b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a`
`font_01_sfnt_off000158b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x158B9	5308 bytes
SHA-256: `a4258fc9870f73a8ba62332964020bbc637e66090c18032f14ae965ac8d7f553`
`font_02_sfnt_off00016ab9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16AB9	10216 bytes
SHA-256: `bb3cfa67cc2c6391d6a1c5779d04b290072e11d3dfe1bf79ab24389055baa3f2`

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