PDF malware analysis — malicious · 8dbfa2a2792bcffd

MALICIOUS

PDF

81.7 KB Created: 2021-03-29 01:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: a0f84bb1a9136a28cfa9dfae9a9f6828 SHA-1: 03e06d3ffa84f7aea5f10bc27d217a00f3a7cf91 SHA-256: 8dbfa2a2792bcffd87c8675c421a3eaca873e44ab0afb3864f58cd7c36a7ec01

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple external URLs, with one specifically identified as a lure for MFA or credential harvesting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing purposes. Although no scripts were extracted, the presence of numerous links and the MFA lure suggest the document is designed to trick users into providing sensitive information.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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://resalured.ru/123?utm_term=verify+marksheet+up+board PDF link annotation
- http://7lessons.website/95595366109nlpek.pdfIn PDF document text
- http://mavito.online/mathematics_worksheets_for_grade_6ovikr.pdfIn PDF document text
- http://stroiline74.ru/relanasoxifrz4o.pdfIn PDF document text
- http://vuwimoxit.mygamesonline.org/the_principles_and_practice_of_auditing_puttick.pdfIn PDF document text
- http://leaninrzpd.site/14113508283nhsy6.pdfIn PDF document text
- http://idealica-ufficialeitalia.website/ruvenaditawamitbein.pdfIn PDF document text
- https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
- http://bupetud.xyz/beginning_visual_basic_2015_by_bryan_newsomeiykj2.pdfIn PDF document text
- http://parhelifrl.space/muhakemet_l_lugateynq5ylv.pdfIn PDF document text
- http://gadivawiw.sportsontheweb.net/robotic_arm_report.pdfIn PDF document text
- https://cdn.sqhk.co/divononawe/BDfjijC/55246653535.pdfIn PDF document text
- http://app-3null.com/90558787589tign9.pdfIn PDF document text
- http://herss.space/41057235430o1udi.pdfIn PDF document text
- http://dreabling.online/inocencia_interrumpida_pelicula_completa_en_espaC3B1olf3zvf.pdfIn PDF document text
- http://magic-world.site/6652130998oan10.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://pigutun.myartsonline.com/how_to_silence_a_samsung_microwave.pdfIn PDF document text
- https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_e6c401029cd44698aefaef1b1624cd01.pdf?index=trueIn PDF document text
- https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_49c1bcf4bc9d43bea4c6cd914e6f3cad.pdf?index=trueIn PDF document text
- https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_4b19613353444485b1ccf0b1d042fba0.pdf?index=trueIn PDF document text
- https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_3225b771cb9448729b6f4eda4203bbcc.pdf?index=trueIn PDF document text
- https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_17a9576aefb7492bb915df7c835f50ef.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC3B	5520 bytes
SHA-256: `0b5c59bb3e2bd370c2ff41327bff72963e34c6702df34a7f7fb738546f0ee0b3`
`font_01_sfnt_off0000fed7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFED7	11076 bytes
SHA-256: `3f3979d6f99a0a75d2179be25aeee4394e24cba5ab6f99a6e3dbb490fef6a0a9`
`font_02_sfnt_off000124bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124BC	16068 bytes
SHA-256: `3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070`

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