PDF malware analysis — malicious · 450132b66db41da5

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 08:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: f4966e14f398853c552147ea53e8f160 SHA-1: 4e8fc2c4d80a6e477adac6d54c8620f502b53a4f SHA-256: 450132b66db41da5c85d967832691b31ef161fc92ae56cc749c414ffd97063fc

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to malicious sites. The primary malicious URL identified is 'https://xezojetit.ru/wix?keyword=mu+origin+hack+diamond', which is flagged as a high-risk redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://xezojetit.ru/wix?keyword=mu+origin+hack+diamond PDF link annotation
- https://cdn.sqhk.co/badiboxa/ggiGghz/felalobifaval.pdfIn PDF document text
- https://cdn.sqhk.co/kejaxedusuk/ibijE0r/80_s_music_free_listen_to_online.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_1c5a7beefce846ec911306c5faebe456.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/3f536a6f-c855-494a-8419-f0d1be07e0ef/37382698531.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/036f39bb-b77a-486f-886c-d2e30ad21438/future_progressive_tense_worksheet_grade_5.pdfIn PDF document text
- https://s3.amazonaws.com/kovilowab/braverman_test_deutsch.pdfIn PDF document text
- https://s3.amazonaws.com/jajuzasalikirut/alabama_shakes_sound_and_color_zip.pdfIn PDF document text
- https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_8e4e679e09ed4d259a30ca9bbdf4ef23.pdf?index=trueIn PDF document text
- https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_7b6625ec884a4b6199cb78d83c95e341.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pizivurapab/a1c_to_blood_glucose_conversion_chart.pdfIn PDF document text
- https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_edcd62d5383c4210845170e51c11b9f3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mexesazaxasa/mofakuvoma.pdfIn PDF document text
- https://s3.amazonaws.com/retobifulipo/ruwinagano.pdfIn PDF document text
- https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_54aca0cf60f0445d82b2eefb52c88eed.pdf?index=trueIn PDF document text
- https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_79020d76f4324838b46c8ef495876d36.pdf?index=trueIn PDF document text
- https://4dd62b93-bb0f-494d-9363-2046eec350ea.filesusr.com/ugd/e54fc7_51a5aa9055d44cdc8af136bbba9cf7d6.pdf?index=trueIn 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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d652.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD652	5212 bytes
SHA-256: `87e162a0ad675dd50a101a15e0e3c641d42db247115f108abf5d68e1a0557fde`
`font_01_sfnt_off0000e7f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7F1	11160 bytes
SHA-256: `721cf79674029c90f633e05302ae6bbbf2a427847c3f1e1dde9e0b6c3497b150`
`font_02_sfnt_off00010dae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DAE	16080 bytes
SHA-256: `28d5afbff6c2e9e687c0d9657fc0c8653379f131105490b33dc0c12c71f72ad8`

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