PDF malware analysis — malicious · 21a74b914529b4cb

MALICIOUS

PDF

93.6 KB Created: 2021-06-01 21:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 8349a4e8830f012387f27c66992aa0b8 SHA-1: bf5c091caa32eac2f138cec2292be40758be67b8 SHA-256: 21a74b914529b4cbd8ceae76d856b182c8da5507bb3536ea888cda8d43d2b4a6

96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://baarspo.ru/123?utm_term=basic+english+speaking+course+syllabus+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4378386/normal_5fc666391c807.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370317/normal_5fe508ccba3fe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425230/normal_5ff7c9f8e2adb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4499021/normal_605d9ed412ef3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373520/normal_606b8b8027ff8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476437/normal_6064b927b126d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4483604/normal_6002fa948733b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445544/normal_5ff30db47fee7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426688/normal_602049b23bebf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407086/normal_602cd65e58383.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470962/normal_60676d1a4a7ee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388177/normal_6037d4abce623.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449630/normal_5fffbd36525d8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427284/normal_604ddc45cb031.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415292/normal_5fe7b1e2c94de.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
- http://watusuxipidu.pbworks.com/f/22067944835.pdfIn PDF document text
- http://funinupun.pbworks.com/f/40883153624.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2e4d9050-a1fa-4854-952f-b16f429eede5/2422729431.pdfIn PDF document text
- http://zemenifinabe.pbworks.com/f/sowakojovikazubamam.pdfIn PDF document text
- http://kufujibumufa.pbworks.com/f/41045904608.pdfIn PDF document text
- http://bofamawetodo.pbworks.com/f/ielts_writing_task_2_topics_2021_with_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3f0ef75-602b-416f-a2a5-7f9ee3471748/can_i_make_an_appointment_at_the_texas_dmv_to_renew_my_license.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e1cd4661-897b-457b-ae36-4ca0bcf941d5/43344701042.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_off0000fae9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAE9	6440 bytes
SHA-256: `2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb`
`font_01_sfnt_off00010ade.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ADE	5572 bytes
SHA-256: `cd9c01e46c957a5c56d2865b35194563192d035679c7896a84503ff3df27c213`
`font_02_sfnt_off00011db7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DB7	11324 bytes
SHA-256: `69d63c1d43e0b5f754f42524302e0cba61eae81fd55df49c6eeebe5bfe792015`
`font_03_sfnt_off0001448f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1448F	16144 bytes
SHA-256: `2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174`
`font_04_sfnt_off0001598e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1598E	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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