PDF malware analysis — malicious · 48a1b5965e2c45eb

MALICIOUS

PDF

115.4 KB Created: 2021-05-30 06:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: dc1b1f312567c4e83896c5323e5e7c04 SHA-1: 7193126d1a12d1e021a9ecf8ef9f35da1a909c44 SHA-256: 48a1b5965e2c45eb55a11077df57e41dbd3717ad7bf8f4d5f7dfc619a398f7b1

156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

Heuristics 5

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 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://dugedepap.ru/strik?utm_term=cuentos+cortos+para+bebes+con+imagenes+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4365602/normal_5fe6a42b529aa.pdfIn PDF document text
- https://tatuxosigataban.weebly.com/uploads/1/3/4/7/134770737/kipunugogilakuwoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372086/normal_6058d4cd261f4.pdfIn PDF document text
- https://baneforozusen.weebly.com/uploads/1/3/7/5/137504069/nizoj.pdfIn PDF document text
- https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/9232978.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4494149/normal_6001a9ea120d7.pdfIn PDF document text
- https://gexifimi.weebly.com/uploads/1/3/4/6/134672357/6086e25d7b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444358/normal_60314939313cd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446942/normal_605b99720ef6e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/9fe97d2c-f7dc-411e-9259-aec224188cba/how_much_writers_earn_in_india.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b763e8a-6ad1-4613-8a89-199597bdccd4/govira.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0029618b-66ed-4001-89c6-d17cccb31b7d/texumi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f504d91-03b8-4cb7-96af-1a6d0056f5ff/97934880218.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ce0a111-7bf6-4b63-8c77-24067f68161d/el_jardin_secreto_libro_completo_en_espaol.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/968e7b26-2661-4273-a73b-a4caa91f75f9/kusedekoz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6febf5f8-29d7-47ae-8a17-2dcdff74fcc9/bojatoxotija.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b5414539-8ed9-40a3-b1ab-c7c1df4ef4f2/goregaw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e8e9a872-adf6-4d97-946a-da0e07e375c1/has_a_series_of_unfortunate_events_finished.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4a650a07-4bce-45cb-8959-766ee5715e93/tude_dune_fonction_rationnelle_avec_valeur_absolue.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/90987c57-60a2-4082-bb7b-e23a8595bc4f/oracle_sql_date_format_yyyymmdd.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/218ebbdd-30dc-427d-bd4e-6a89c94bc4ea/s10_radio_wiring_harness_diagram.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00185086-25b7-4759-aa9a-9b2ef953f818/88574404526.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2dd857c5-e9c0-402f-a6d1-dda3243d705a/yamaha_mgp32x_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e77f1b21-9371-45b2-a53a-66d1a08b6bb5/how_to_thread_a_new_home_sewing_machine_model_656a.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10205	6588 bytes
SHA-256: `fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a`
`font_01_sfnt_off0001127f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1127F	5488 bytes
SHA-256: `59dc7c8ce66546afad08c96bdae1979f69bd98aa33b8f09edefaca415e247714`
`font_02_sfnt_off00012504.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12504	29604 bytes
SHA-256: `2defa99c030cc297b2adf40c1580d8379fe135f86f8880125cda167be2ae02f7`
`font_03_sfnt_off00017b8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17B8C	12072 bytes
SHA-256: `c19a46edd4386a9d1e520fc808dbeaa524eedec401c7256d4b62036a1c59743c`
`font_04_sfnt_off0001a2c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A2C1	17512 bytes
SHA-256: `5d48c07c2edf5b6b7c613f112e9466e8ebba49bcaf99705eb27a7137457ee0a0`

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