PDF malware analysis — malicious · 8a17b4c41730181f

MALICIOUS

PDF

83.2 KB Created: 2021-03-19 22:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: f91b547a5fc93998a46a0d7bbabb69c7 SHA-1: 452a4792ebc42a8a958d66a2a842ad4ac354f534 SHA-256: 8a17b4c41730181f4139b1fd36fd170ad4cf140998dcb9c1292198c62a8cb3c9

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

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://golowaki.ru/award?keyword=child+care+assistance+application+pdf PDF link annotation
- http://popisazono.getenjoyment.net/a_series_of_unfortunate_events_season_3_episode_2_full_episode.pdfIn PDF document text
- http://fumuroruzej.medianewsonline.com/14893863031.pdfIn PDF document text
- http://kivolugog.mypressonline.com/56699311927.pdfIn PDF document text
- http://gaxuzafepuwe.iblogger.org/present_perfect_simple_and_present_perfect_continuous_advanced_exercises.pdfIn PDF document text
- http://safetymirrors.xyz/my_sister_the_vampire_switchedoa1b0.pdfIn PDF document text
- http://sibuvre.com/aur_pyar_ho_gaya_episode_369ez9c.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/degagaziv/wamujalezatewuvu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d4c5862d-ca35-4ca3-8cdb-87c7e87670b2/67229100833.pdfIn PDF document text
- http://diwekudajon.epizy.com/emergency_room_doctor_salary_michigan.pdfIn PDF document text
- https://s3.amazonaws.com/retobifulipo/mexedaxixewipamibafika.pdfIn PDF document text
- http://penanaras.myartsonline.com/beauty_by_jane_martin_symbolism.pdfIn PDF document text
- https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_7f0dd262e7404479bc74ef71765da9ce.pdf?index=trueIn PDF document text
- http://merizipu.rf.gd/diagnostico_de_salud_comunitario.pdfIn PDF document text
- http://ligoroxenafof.atwebpages.com/99805789571.pdfIn PDF document text
- https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_4866f0659cce4adda1b407b296f4ae12.pdf?index=trueIn PDF document text
- https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_f0ba615e1679422eb0b78465a51c8114.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/bad75772-f61e-4573-8e2c-1c4050349d19/53090071920.pdfIn PDF document text
- https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_a11095dde81c4d83964eab4e36ceac11.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/2dccebb3-85e7-4d27-9592-9bf9fe7fa277/vurutiwa.pdfIn PDF document text
- https://s3.amazonaws.com/zowejunef/frontier_airlines_information_phone_number.pdfIn PDF document text
- https://s3.amazonaws.com/bisiku/56674361701.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fbf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBF2	5052 bytes
SHA-256: `08f905dbfb37ef7b3bd9d6be0fbcc2d58da2752e0e03a951a128dad33438064e`
`font_01_sfnt_off00010d09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D09	10664 bytes
SHA-256: `2bf6d84b6e0fdf72b34c50d62629ca49f4837463731b6cb5e74a4127b58cf855`
`font_02_sfnt_off0001317b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1317B	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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