Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00fe43a10e66aef…

MALICIOUS

PDF

77.2 KB Created: 2020-11-20 08:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1341d8ee113d43ec3d36e7c4b1b29e50 SHA-1: 7f6e807dee166a1059665bd5ae889f8a093f65be SHA-256: b00fe43a10e66aefc4dae4c278b5c83b739d099385916705b8bad39523386d39
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to 'Aetna better health of va reconsideration form', likely intended to trick users into clicking the embedded URL. This URL leads to a domain associated with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=aetna+better+health+of+va+reconsideration+form
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f95c91cdcdba.pdf
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5fa827d229a12.pdf
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f9b55c57f5dd.pdf
    • https://cdn-cms.f-static.net/uploads/4391340/normal_5f93d2e70887b.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f994b988e2b9.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5fa4516394dbb.pdf
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f965df8e9391.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mipizaju/adjectives_adverbs_and_verbs_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/b07dbd53-129c-4f06-993a-ef55d0c3e8ff/desaborozabasikebevog.pdf
    • https://uploads.strikinglycdn.com/files/f5362c26-d91a-410c-8943-99751762fb0d/the_format_form_is_not_supported_for.pdf
    • https://uploads.strikinglycdn.com/files/fa298dbb-becb-4452-ae5b-466a8b1f13eb/15026010791.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/21885956956.pdf
    • https://uploads.strikinglycdn.com/files/045f1bb1-cd5b-4ab0-a665-9dee30f6eaec/caracteristicas_de_un_procesador_de.pdf
    • https://s3.amazonaws.com/sugowubuf/search_inside_yourself_ebook.pdf
    • https://s3.amazonaws.com/pujirageg/46363819845.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_off0000c25c.bin
1f83fe0f128e1904568b009f3ded978c0cda41e2ec47ecff2f47fd5c48426ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC25C 13412 bytes
font_01_sfnt_off0000ed31.bin
b70765e5fe5a0300cdfb8236cb9427977cdb1390f43b9ee35456b960749ec41c
pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 5448 bytes
font_02_sfnt_off0000ff9a.bin
f8f9725e07a3ae6fa6ff329183ee7c6a2d23851eb9e27dac08b25be65f44ce5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 11996 bytes