PDF malware analysis — malicious · 09ea6646c4a68b24

MALICIOUS

PDF

78.0 KB Created: 2021-03-31 13:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 44de5461cd62e7d879da6a79d97c92ac SHA-1: d961f021114dd985e0325279d6de10748a1b2044 SHA-256: 09ea6646c4a68b243d2a3dbf729b6f25e252ef8587547cee4a8781b060561296

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the overall heuristic firings indicate an attempt to direct users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://leonvi.ru/wix?keyword=instlife+ceo+guide PDF link annotation
- https://cdn-cms.f-static.net/uploads/4389604/normal_602c28d8dec69.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421966/normal_5fdba39a8bf17.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490138/normal_5fd9f3b9530bb.pdfIn PDF document text
- https://cdn.sqhk.co/waxobakal/9iijgjc/32527936256.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419818/normal_6029445536ed9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501645/normal_6044fa69bab36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385198/normal_5fe70ee61e8fc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488804/normal_5fed42f9a3e63.pdfIn PDF document text
- http://xajekuk.22web.org/corporation_tax_act_2020.pdfIn PDF document text
- http://jabolemifagafu.22web.org/materiales_ceramicos_en_la_construccion.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416132/normal_6050762d74450.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491155/normal_603c18675f6f5.pdfIn PDF document text
- https://cdn.sqhk.co/puvubuzu/gbRwihB/minonunavulodetexivunujus.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/fowikorejodi/android_9_note_8_multi_window.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db39276d-3c9f-40e8-8251-a0f181deee4c/introduction_to_embedded_systems_valvano.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f3d4a4e-22d8-4bba-b311-4fe0634ea0e6/fixebarorivofalizalok.pdfIn PDF document text
- https://s3.amazonaws.com/levovod/whelen_edge_9000_lightbar_wiring_diagram.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ac68d43-cea1-4f31-ae9f-f8994a457991/dnd_5e_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec1674e0-2987-4785-993e-8fdfe895764a/can_i_put_vicks_in_my_diffuser.pdfIn PDF document text
- https://s3.amazonaws.com/panalipolifod/54471804243.pdfIn PDF document text
- http://wirirarosutuki.epizy.com/how_to_take_natural_log_on_calculator.pdfIn PDF document text
- http://winovonisalupib.rf.gd/tabla_de_pulgadas_a_milimetros_en_tuberias_de_cobre.pdfIn PDF document text
- https://s3.amazonaws.com/dubiditiginowo/has_itc_declared_dividend_for_2020.pdfIn PDF document text
- http://xisamilar.epizy.com/suwotavudikatejonutibegu.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/94934478126.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_off0000f57a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF57A	4820 bytes
SHA-256: `9d03a864a0d909e0b7f4bfc225e7b63bd66f7c35df1137b48e4feeac7f25fac4`
`font_01_sfnt_off000105fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105FB	10736 bytes
SHA-256: `2403da65a68b3a7a5fda4cd6a9de66ff04720ddd0d1dd1f582a22d73992e3a32`

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