Malicious PDF — malware analysis report

Static analysis result for SHA-256 2574543049e90952…

MALICIOUS

PDF

68.9 KB Created: 2021-02-21 09:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2a238e07bc06a48c16bbc27dba70ed62 SHA-1: 12707c0c13a2ee1e880c6c93044a4c1be5d8b7a2 SHA-256: 2574543049e909520c256dada46896e298e973e7fdbc698b935bfed12ae25a1a
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 website disguised as an answer key. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure suggests it's designed to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=chapter+9+answer+key+biology PDF link annotation
    • https://cdn.sqhk.co/sixitigoxeto/ijhjRhe/zodiac_signs_facts_leo.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/ghfwirH/underhand_pulldown_alternative.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/dvpifYp/surprise_egg_vending_machine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruludamena.epizy.com/xamarin_forms_bitmap_to_byte_array.pdfIn PDF document text
    • http://mivevusewez.epizy.com/62517567583.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/what_does_it_mean_when_your_beats_wireless_are_blinking_red.pdfIn PDF document text
    • http://zuraravata.epizy.com/fonobofokamid.pdfIn PDF document text
    • http://watijosanowo.epizy.com/26414405796.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/dragon_age_alistair_romance_guide.pdfIn PDF document text
    • http://volajigatume.epizy.com/vubomekolotamazenod.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/6584034329.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_off0000d237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 5540 bytes
SHA-256: 317403b2ea28cd0a6f7459503db0ffa80058da9cabd961539b1e588450d87909
font_01_sfnt_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 10068 bytes
SHA-256: 2e957ddc3f11794cf0fc2538f98f66ff2325c2492894134deb51fd4d856cb134

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