PDF malware analysis — malicious · 7f918c29392b93a3

MALICIOUS

PDF

83.7 KB Created: 2021-03-11 21:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 8c3edc477c9f0a4f8f4bbb0d99622369 SHA-1: dcb555e88139bb18d2a58fcec5988ca27dbbf9d7 SHA-256: 7f918c29392b93a391d20f7d6f177eeb6915c6b08b8e7ec25eaedcbf772d1fdf

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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 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://botokaw.ru/award?keyword=search+pdfs+for+text PDF link annotation
- http://busforpay.online/plan_a_meal_plan_beachbodywg62q.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470405/normal_600e5b2faca07.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387698/normal_5ff3a2d72204c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386330/normal_602c3da3545da.pdfIn PDF document text
- http://prizinsta24.online/beats_solo_3_wireless_bluetooth_adaptery958x.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417997/normal_5ff385e2df24f.pdfIn PDF document text
- https://cdn.sqhk.co/xeloxilava/bBgPULM/battery_plus_discount_coupons.pdfIn PDF document text
- https://cdn.sqhk.co/bapisolel/gglUgd6/women_s_mountain_bikes_for_sale_walmart.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388285/normal_602d00aa58f3f.pdfIn PDF document text
- http://prizinsta.info/92127977541326ro.pdfIn PDF document text
- http://c-advance.space/machayenge_song_background_music_rinov7df.pdfIn PDF document text
- http://com-signto6.xyz/me_before_you_full_movie_download_hd_popcornsu9ic.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427103/normal_600fd5af6b28f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/5edfc696-9455-4e04-a4a9-2491ad84a3a0/nidimolanedopoweredaz.pdfIn PDF document text
- https://s3.amazonaws.com/tojazudibumogab/5th_harmony_worth_it_song_free.pdfIn PDF document text
- https://s3.amazonaws.com/nokiva/vitiva.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71ccca54-46ae-4d7b-ad27-5b1d650ee1d8/nagetepiwa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27a05048-69d3-4b19-9da2-9e6044e878e7/gevilufekamifiv.pdfIn PDF document text
- https://s3.amazonaws.com/getizar/sinusite_maxillaire_aigue.pdfIn PDF document text
- https://s3.amazonaws.com/xakapudakadu/facial_cleanser_brush_manual.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e87e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE87E	5016 bytes
SHA-256: `2af31334080c0c4081940bb399aa6c5425867befb16563c07fe174da4fe37385`
`font_01_sfnt_off0000f99a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF99A	10704 bytes
SHA-256: `4d84fd4d82c94895ad678e3422d9009e842ba13bffb9ce794a1fd60fd773e72e`
`font_02_sfnt_off00011e47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E47	16240 bytes
SHA-256: `20dc887637f87c60f5f5f032b59006863323ddce3c1824f915f0414447b058c1`
`font_03_sfnt_off00013381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13381	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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