PDF malware analysis — malicious · be955874e605f2a2

MALICIOUS

PDF

78.6 KB Created: 2021-01-22 12:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 2a2fe7cd2fe3c55553855153af5cb238 SHA-1: d8214f965b8bf1df2c1276d05c63e4a708c09437 SHA-256: be955874e605f2a26ee3b6e29d9f2be20b3c20399c19a4a83714ebe7e6f3d3de

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. The document contains numerous embedded URLs and exhibits characteristics of a link farm, suggesting it is designed to redirect users to malicious sites. Notably, a heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common lure for executing malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://trafficel.ru/123?utm_term=pokemon+3ds+randomizer+mac PDF link annotation
- https://site-1192291.mozfiles.com/files/1192291/88973735677.pdfIn PDF document text
- https://site-1172122.mozfiles.com/files/1172122/canonical_meaning_in_information_technology.pdfIn PDF document text
- https://cdn.sqhk.co/gituridewo/SDiasgh/cut_the_rope_candy_feast.pdfIn PDF document text
- https://site-1174103.mozfiles.com/files/1174103/atomic_bomberman_romanian_language_pack.pdfIn PDF document text
- https://site-1168326.mozfiles.com/files/1168326/13685017294.pdfIn PDF document text
- https://cdn.sqhk.co/mudinaxape/gjjLjaK/slitherio_game_download.pdfIn PDF document text
- https://site-1168088.mozfiles.com/files/1168088/american_racing_pro_series_drag_wheels.pdfIn PDF document text
- https://site-1173293.mozfiles.com/files/1173293/lekegi.pdfIn PDF document text
- https://cdn.sqhk.co/purorelaz/hRzp2jb/holistic_assessment_in_education.pdfIn PDF document text
- https://site-1171847.mozfiles.com/files/1171847/vawikofu.pdfIn PDF document text
- https://site-1168173.mozfiles.com/files/1168173/extreme_hardship_letter_template.pdfIn PDF document text
- https://cdn.sqhk.co/rogokivika/Nghji1a/63119522216.pdfIn PDF document text
- https://site-1251451.mozfiles.com/files/1251451/bardon_state_school_uniform_shop.pdfIn PDF document text
- https://cdn.sqhk.co/lopumilekana/eIjeSpI/laguwajasegozubaso.pdfIn PDF document text
- https://cdn.sqhk.co/rozopebak/MjemVje/freebies_validity_meaning_in_tamil.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/kibavutibeved/integrated_agriculture-_aquaculture_farming_systems.pdfIn PDF document text
- https://s3.amazonaws.com/rodakarugupoko/teguwixuk.pdfIn PDF document text
- https://s3.amazonaws.com/wozowuledij/ischemic_stroke_treatment_nice_guidelines.pdfIn PDF document text
- https://s3.amazonaws.com/nowonovege/bollywood_movies_2019_free_sites.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
- 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_off0000e059.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE059	5332 bytes
SHA-256: `8c560a8911282aab983bbdcab473d420ac92e67dedfca7517bd4a20d78f4f275`
`font_01_sfnt_off0000f270.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF270	10464 bytes
SHA-256: `8d8284e4b60971428d3308102703d31b5fc5440c2615c9782a0840143f955ef9`
`font_02_sfnt_off0001165a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1165A	16088 bytes
SHA-256: `b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e`

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