PDF malware analysis — malicious · cf203d6218ad67a4

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 23:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 72525fb5a51c72aa061279665a2be74b SHA-1: bddd4f6357904fbdf242a8014fe4801f15ca02b8 SHA-256: cf203d6218ad67a4fbc806566c0f1fae6d9b9dfd8bd6391393918859ae0f70f4

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into revealing sensitive recovery information. While no scripts were directly extracted, the presence of embedded URLs suggests a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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://druttle.ru/award?keyword=tax+on+salary+in+cambodia+pdf PDF link annotation
- http://canonsburglake.com/types_of_gears_and_their_usesbqqs2.pdfIn PDF document text
- http://tonemisi.medianewsonline.com/head_of_customer_relations_job_description.pdfIn PDF document text
- http://wuroguredogir.getenjoyment.net/61119358536.pdfIn PDF document text
- http://shishkin-seed.xyz/why_are_my_wired_beats_not_working5gcdw.pdfIn PDF document text
- https://cdn.sqhk.co/muribirigim/WHhjhht/62481385046.pdfIn PDF document text
- https://cdn.sqhk.co/viwiratoposu/5a8RhiY/raluworekadurenunusig.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470524/normal_6043feb8cbaf8.pdfIn PDF document text
- http://zabemaladameg.medianewsonline.com/how_to_connect_bluetooth_bose_earbuds.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404488/normal_5feb54d1996d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427811/normal_60274efe02af0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414500/normal_5fff41ea8514c.pdfIn PDF document text
- http://community-day.ru/cabelas_pro_series_10_tray_digital_dehydrator_replacement_trays0v5dw.pdfIn PDF document text
- http://mnogolidov.xyz/68257198788rgu7t.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_a140a80eb6444779a9aaa3c3bcad887c.pdf?index=trueIn PDF document text
- https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_bdc9d29836e347dc95f3c8c73b6b3c89.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/188893f1-1e17-495a-9636-17fedca09866/62774424416.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4139db3f-de73-4807-bbcf-0984873afda4/loops_and_threads_sock_loom_patterns.pdfIn PDF document text
- https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_01ce5c8b31e347aabf81cba0a67565d9.pdf?index=trueIn PDF document text
- https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_1533aa1b82bf4946a96a108c2c36f59d.pdf?index=trueIn PDF document text
- https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_2fba5fc5bb144e9991c1d859830cac0e.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE9D	5560 bytes
SHA-256: `413d9f4fb30dc49e56c66649e7369c5bfa298d427e43615c6654a9229aa59271`
`font_01_sfnt_off00010175.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10175	4264 bytes
SHA-256: `3444f7670e529204e0c65288022649d4f63e8501f6dfddab72bcd88c7efe95ff`
`font_02_sfnt_off000110e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110E6	11472 bytes
SHA-256: `65aafa70efcea21bc99168505bb3f89e5fb2891ffdb1ec8939b2808048ddab45`

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