PDF malware analysis — malicious · 508c02fb5748337c

MALICIOUS

PDF

132.2 KB Created: 2021-04-04 22:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: f775f57a443e577ce34e7f46b62f1f58 SHA-1: 183eb029ce965982884d21c62f813f417f42f279 SHA-256: 508c02fb5748337c0c15a06fd1c8aa534178cb0ab68b87e8435ca50ad136c5eb

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://nipisod.ru/123?utm_term=googletest+install+guide PDF link annotation
- https://cdn.sqhk.co/jadizefon/fpjhrvc/nova_pop_100_honda_2019.pdfIn PDF document text
- http://getdouche.xyz/metal_gear_solid_2_substance_manual1v0o2.pdfIn PDF document text
- https://cdn.sqhk.co/kinifukix/jjcgijb/cricket_bowling_green.pdfIn PDF document text
- https://cdn.sqhk.co/gebitasixa/jPgiYhj/savings_goal_calculator_excel.pdfIn PDF document text
- https://cdn.sqhk.co/sugigevapure/cHRV5jd/veeam_backup_cloud_storage_pricing.pdfIn PDF document text
- http://shmelev.pro/samsung_galaxy_tab_4_7.0_price_in_nigerianwcmp.pdfIn PDF document text
- http://life50it.pro/10503591945a6hc9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465396/normal_5ff1140dbe648.pdfIn PDF document text
- http://lovepositions.info/dipujubeveladd1h3s.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365576/normal_5fd0c37f992ba.pdfIn PDF document text
- https://cdn.sqhk.co/weteroliwo/gjhfjiP/boom_beach_apk_unlimited_money.pdfIn PDF document text
- https://cdn.sqhk.co/kigimole/ONigGgf/54850651303.pdfIn PDF document text
- http://ogranicbio.fun/how_to_print_4x6_photos_on_hp_envy_56608ldfc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392207/normal_5fe7d23879685.pdfIn PDF document text
- http://medyayazilimtr.com/lavulabakakeritavazunuwlxao.pdfIn PDF document text
- http://2022god.com/24190009257441ka.pdfIn PDF document text
- https://cdn.sqhk.co/wabajevebe/ajbhbnl/mojunozobuj.pdfIn PDF document text
- https://cdn.sqhk.co/bazopaxepifu/LQiaHjb/coin_pusher_game_win_real_money.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392444/normal_602d1f16746d9.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://s3.amazonaws.com/dufekifaral/3ds_max_character_animation.pdfIn PDF document text
- https://s3.amazonaws.com/gavobawum/salmon_california_roll_nutritional_information.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_off0001a902.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A902	4812 bytes
SHA-256: `4b4be6080cdb7623b0b22b4ecba6c94ec9a99c1fe73b158e39ef289e70a32460`
`font_01_sfnt_off0001b972.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B972	11168 bytes
SHA-256: `686664b50bd3128ed5e93b6a5e3ce1a9e26ad7a9a3f756dde247329366a3a406`
`font_02_sfnt_off0001dfd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1DFD7	16204 bytes
SHA-256: `c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449`
`font_03_sfnt_off0001f506.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F506	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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