Malicious PDF — malware analysis report

Static analysis result for SHA-256 930a0d5a6f4bcb01…

MALICIOUS

PDF

106.0 KB Created: 2020-12-19 17:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ab88628d2150180dde0b7978f181cd5c SHA-1: 710bcc59d831a106301dc319fc7911f4badf208d SHA-256: 930a0d5a6f4bcb01ea1b271495348c13c06a1c186cd63a55daa48977f6b0513f
156 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, and a critical heuristic indicates it's a lure for recovery secrets or private keys. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lure suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=algoritmo+rsa+pdf PDF link annotation
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/14f722ad2f95cbe.pdfIn PDF document text
    • https://kenodijegubiv.weebly.com/uploads/1/3/4/5/134501598/3678592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc202a39ee0f32b8799a60d/1606550180623/little_miss_dangerous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ba6616-167e-47bd-8a83-7ad988b23156/bar_x_ranch_lots_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/what_is_an_elar_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/10151295849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf61b65-6f02-45cd-97c7-c247966d7148/44420660219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f173d222-e2b0-4e69-9890-e3b02e651965/xafitupivorosinaw.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/tivevojevuzubarerinuvuz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59aeaea4a794d566534d6/t/5fce30870ab5d62feb1d03e7/1607348361540/mazaluxenoke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E4E 5348 bytes
SHA-256: 0fb3b6ac02ddbd6d328839c05ecbddae62e7cfe05682cdd1566907b4164ee96e
font_01_sfnt_off0001606b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1606B 10988 bytes
SHA-256: e8b7bbee033282d89f6804020da63e5188f25bb6cb8dae9bad6b7c4d8e18f73f
font_02_sfnt_off0001862b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1862B 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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