Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac367d4815be8e3a…

MALICIOUS

PDF

58.2 KB Created: 2020-12-23 16:09:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9ee67e8a55e7627be734c77651f8b294 SHA-1: d913689221a0688fd7c1a995f2d6fbf541364a17 SHA-256: ac367d4815be8e3a7e8c53f03b2cced7680e88a7f67ade0c9c185e606789bd36
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to contain references to 'DPS portal teacher' and 'wkhtmltopdf', suggesting a lure to a fake portal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/wb?keyword=dps%20portal%20teacher PDF link annotation
    • https://cdn.sqhk.co/jasorevujoxu/RBiwtuh/massive_mimo_beamforming_antenna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5fa1aedf66d77.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/9956e690-0f91-48d4-81e4-1b6fc33c607f/bawov.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/59112264382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e861af79-e4a7-4449-bffa-ec9cedf3722b/lash_excel_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c30fc5-dc59-421f-aad9-94776e5da028/master_conjuration_spells_skyrim_quest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2428a157-2e62-4624-aa41-1215465e3f35/gitezatatuni.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/29310238693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7564eaa1-41e1-4c68-aff2-afe02c08af4d/ping_g25_one_inch_extended_wedges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2aabb3-60c1-4423-afe3-fbe5ecb50934/2017_nissan_rogue_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/fanaditeforamudoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ffd6c0-af25-4f9c-a107-998f45f07c44/tokasefazopupifubekun.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACF 5020 bytes
SHA-256: ff3d8914af61f6e63c939925d279fb3b4279d4919958b29af11ac9bc65f94dac
font_01_sfnt_off0000bbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD9 9216 bytes
SHA-256: 92d6df1b8fb66c2f103c317aeac442aa3544c36189c9452a78678b0251aeca70