PDF malware analysis — malicious · 37660a9414169ea9

MALICIOUS

PDF

86.0 KB Created: 2021-03-23 22:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 7db2862e468603168997752b315ff086 SHA-1: b0171a5a957294c7150d51a9006b086966ff46b8 SHA-256: 37660a9414169ea9e4a65b8d2c8d1bd6bcb686520f6916c2bb618add76ad0fed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or SEO manipulation tactic. One of the primary URLs, https://leonvi.ru/wix?keyword=be+mature+warren+wiersbe+pdf, is likely part of this scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malicious content delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://leonvi.ru/wix?keyword=be+mature+warren+wiersbe+pdf PDF link annotation
- https://pojuzalik.weebly.com/uploads/1/3/4/2/134235388/4027669.pdfIn PDF document text
- https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/7505eb66466.pdfIn PDF document text
- https://tagebukolili.weebly.com/uploads/1/3/0/7/130776523/bijuzezarif.pdfIn PDF document text
- https://godowipi.weebly.com/uploads/1/3/4/5/134520373/mamitesawudemujelesi.pdfIn PDF document text
- http://xudikuruno.iblogger.org/ccs_university_private_exam_form_2019.pdfIn PDF document text
- http://werewov.22web.org/internal_meeting_request_email_template.pdfIn PDF document text
- https://jotegeposopema.weebly.com/uploads/1/3/4/7/134743683/tefapifutesumi.pdfIn PDF document text
- https://fizabawizusor.weebly.com/uploads/1/3/4/0/134000364/1302136.pdfIn PDF document text
- https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/nebateputu_dikusejixi_ridoxoramim.pdfIn PDF document text
- https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/1254515.pdfIn PDF document text
- http://debodopox.iblogger.org/codependency_worksheets.pdfIn PDF document text
- https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/paruwus.pdfIn PDF document text
- https://mudujasi.weebly.com/uploads/1/3/5/3/135387492/59e8af510.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_237c500d87dc4c9fb6325f0ed78a4603.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gotitibekovi/63042231949.pdfIn PDF document text
- https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_d9bf11ace0534ae6a2b71d785e72d47d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mujesogi/niv_application_commentary_new_testament_set.pdfIn PDF document text
- https://s3.amazonaws.com/sonutopexaramuf/dekunipivoximilome.pdfIn PDF document text
- https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_d384869020be4823af4490d89c92cc6c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/daxemo/13314347813.pdfIn PDF document text
- https://s3.amazonaws.com/wujixus/timesheet_hours_calculator_uk.pdfIn PDF document text
- https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_2dd28cda67cb4b3c8ca7f84138e77a54.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pipaneku/35765515633.pdfIn PDF document text
- https://s3.amazonaws.com/tutasujal/transfer_approval_mail_format.pdfIn PDF document text
- https://s3.amazonaws.com/wifukedot/contoh_report_text_komodo_dan_terjemahannya.pdfIn PDF document text
- https://s3.amazonaws.com/dowadotiju/how_do_you_know_when_your_baby_is_done_breastfeeding.pdfIn PDF document text
- https://s3.amazonaws.com/jamuluvuvava/2944670561.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000112da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112DA	5436 bytes
SHA-256: `5d220dc64cc7cd4ccb82a824ea4a7f227bf9abf1e1fe5b0ce1456bb7aa27f8ec`
`font_01_sfnt_off0001254a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1254A	10892 bytes
SHA-256: `5e64929c365284eb3d94e73698642489443be4f6bf163e3c92f89319924a0d17`

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