Malicious PDF — malware analysis report

Static analysis result for SHA-256 9627f8019e1f1e79…

MALICIOUS

PDF

74.2 KB Created: 2021-03-21 08:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a783682adf96be363a6d70d2ffd9799 SHA-1: 1965c48cd713341f152b1b5a359066f790bd8278 SHA-256: 9627f8019e1f1e79f61cec6f55d560a670ca4fe9303128da43e9e027287227a3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://golowaki.ru/award?keyword=taller+alimentacion+saludable+pdf
    • https://cdn-cms.f-static.net/uploads/4421613/normal_6048e799ddb41.pdf
    • https://cdn-cms.f-static.net/uploads/4383577/normal_600bc3c2b863b.pdf
    • https://cdn-cms.f-static.net/uploads/4384650/normal_604174907c3ce.pdf
    • https://static.s123-cdn-static.com/uploads/4388813/normal_5fc57062ccd06.pdf
    • http://moresukko.ru/gokikozakupqk74m.pdf
    • http://repair-foto.ru/sadlier_vocabulary_workshop_level_e_answers_unit_1_completing_the_sentenceqdvyl.pdf
    • https://cdn-cms.f-static.net/uploads/4491155/normal_603172b08ce2e.pdf
    • http://kemytbok.xyz/378114946216aib4.pdf
    • http://trackengine.host/spelljammer_5e_officialv2l8e.pdf
    • http://copyright-central-media.com/balance_chemical_equations_worksheet_answer_key26f4z.pdf
    • http://edevletorg.com/34591252660oa4n6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c3b51fd-663d-49a6-a31e-3d37e57da822/ronivat.pdf
    • https://s3.amazonaws.com/mexijegedakol/39584405617.pdf
    • https://uploads.strikinglycdn.com/files/d3a5fa77-f07a-44dc-b18a-b785de706a50/kozerunokutogirejob.pdf
    • https://s3.amazonaws.com/dazovosugev/android_studio_embedded_jdk_path.pdf
    • https://s3.amazonaws.com/meludav/new_movies_free_malayalam.pdf
    • https://s3.amazonaws.com/nakuzafol/hp_deskjet_3050a_j611_wireless_setup_mac.pdf
    • https://s3.amazonaws.com/donarepemi/91202086835.pdf
    • https://s3.amazonaws.com/wizitifowubux/akkurat_pro_regular_free.pdf
    • https://s3.amazonaws.com/guwutivupudutu/vupizi.pdf
    • https://s3.amazonaws.com/bejokazemur/tebigexodewofavinogajipe.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/63245083002.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12b.bin
57f60307718dcac25c6eb633bc561219616efc9cb7881467679803baab50027b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE12B 5392 bytes
font_01_sfnt_off0000f35e.bin
8b30ac1edda2d332ba772adba2a9564b748535e8187f22b1dc46ec894558ca69
pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 11928 bytes