Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c7adf7f95fd07d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 11:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28e88f50ae12c886bd2bdb05743968ce SHA-1: 295cf9914f842515e0946659605051dd4aa98411 SHA-256: 15c7adf7f95fd07d7ea46806eaac7c22e690f470ee1380afaf78569755aee177
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious lure designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=sheet+pan+baked+chicken+recipes
    • http://it50save.info/annabelle_creation_full_movie_freeauqro.pdf
    • http://dsv-trening.ru/cnil_cookie_guidelines0xj6w.pdf
    • http://lamanixumerad.mypressonline.com/senior_project_manager_salary_dallas_texas.pdf
    • http://basiditdcf.space/2251831186877dbz.pdf
    • http://olymp-trade.top/mexulifetf4fb.pdf
    • http://igoscandinavia.com/dimagapurgp81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/23b73d44-7034-4281-a7c4-d9aa3c84659a/orbit_decorative_spinning_sprinkler.pdf
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_e0507ad4ef914ba88a6155f9d2099ac6.pdf?index=true
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_729d546c4fd140ecbc5044886b508abe.pdf?index=true
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_81f75b95dc3445b786a774a8e549d96d.pdf?index=true
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_5458eeef2e924348b6cbb8552697f5c6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6fc24d9f-d04b-4fe8-bbab-dd7eedf60224/bidalalirataroromika.pdf
    • https://s3.amazonaws.com/xapijifas/descargar_drastic_3ds_emulator_android.pdf
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_6570506b906c43ff8736bb6d461ad2f1.pdf?index=true
    • http://tiwatimab.atwebpages.com/43658871101.pdf
    • https://uploads.strikinglycdn.com/files/3573ccf3-dd9d-4762-a45c-11a20f296c66/what_is_calories_surplus.pdf
    • https://s3.amazonaws.com/vavapekadoliti/68365762502.pdf
    • https://uploads.strikinglycdn.com/files/35fa32af-e965-4cf9-85fe-bcb132573380/gulajiz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e860.bin
4ff68f70691c0417b16ab5f7b038c16a51b2b8df62ffcb0c12ba5123b4c00181		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 5116 bytes
font_01_sfnt_off0000f9a8.bin
dbc87d5611d62a60e2e9a63dd9ab91a5b4bc4bb2f8d85791963a2b14b7b8a5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 11136 bytes
font_02_sfnt_off00011f96.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F96 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.