Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca997d772988e60…

MALICIOUS

PDF

74.5 KB Created: 2020-12-05 09:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52f50d3d7f35a10deada1e2415416a5f SHA-1: 11bdc7587867e9590243802f7e775bedf4ce0448 SHA-256: 4ca997d772988e603f26f32bdfcf36eefc2c81bdb9682a2f90dbc05fc59bea7f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9990

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://trafficel.ru/123?utm_term=share+it+apk+download+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f998ab0ce0f9.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/waxetekaganosun_suwozefik_pajadida.pdfIn PDF document text
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/gelinirap_rixeluxiru_punepodoguwob_nokizegavutawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5fa4ae801b07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_5faa7ead7f130.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/2467875.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/bf56d106-44ac-4844-80e8-8f4c31dc5d2a/map_of_san_francisco_districts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d53612-f577-47e1-b5b8-925f5eda1605/libro_de_educacion_fisica_2_secundar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc4f88d4e98326c02ad2d25/1606744206182/density_of_unknown_liquid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ab9781-7719-40e4-8ff3-368aa61eaaa9/diccionario_de_lengua_de_signos_espa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 2952 bytes
SHA-256: d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47
font_01_sfnt_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 5128 bytes
SHA-256: d4cd31fb433ca8626a32fd994c35ea0a2b450d1a9ea7d09b710f7fa2a650419f
font_02_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 10712 bytes
SHA-256: cf9dc71a19bbc7f3741fe4b4ca1dba802dd1a50414d77927d24e1fac43ea7f76
font_03_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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