Malicious PDF — malware analysis report

Static analysis result for SHA-256 0401ad8d4d0e3a78…

MALICIOUS

PDF

83.1 KB Created: 2021-03-24 05:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81dca18e2d1ead9f0ea4dd0e0983e871 SHA-1: 531bd8fb617430d8e510e2bad35cb6b91e2b3ce2 SHA-256: 0401ad8d4d0e3a780545e41f56ca6f652e113eb6ac48459d929d640d238d2fe8
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=play+store+whatsapp++free+for+pc', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to 'Play store whatsapp free for pc', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=play+store+whatsapp++free+for+pc
    • http://nizuxep.iblogger.org/4672469489.pdf
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/dc4e5bf1774.pdf
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/37ce4a2.pdf
    • https://xobiduri.weebly.com/uploads/1/3/1/4/131437628/fiditob.pdf
    • http://bavipame.22web.org/96050074954.pdf
    • http://opencabinets.xyz/field_visit_report_example54bk5.pdf
    • http://bokifov.iblogger.org/appium_for_ios.pdf
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/wokagizobenun-bupiboledelijaz-bemidogibaru.pdf
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/jovobibudure_vowawaw.pdf
    • http://reduslim-official.website/52414088847xhcic.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bikikanafopavu/maradabedisodosa.pdf
    • http://ruvedinaz.rf.gd/11516048368.pdf
    • https://s3.amazonaws.com/sojaxub/91079025963.pdf
    • https://uploads.strikinglycdn.com/files/0685e671-c7d2-47e4-aa79-6382dd1a8a7e/2010_camaro_ss_engine_size.pdf
    • https://s3.amazonaws.com/fekife/wuxub.pdf
    • https://uploads.strikinglycdn.com/files/b90be80a-7515-4b8b-b2fd-91e565bcbf0a/18813664753.pdf
    • https://uploads.strikinglycdn.com/files/d7b50879-7eb0-442b-901a-e717c6c818c6/how_to_know_acid_rain.pdf
    • http://pisozirepuwi.epizy.com/3004560996.pdf
    • http://befokube.rf.gd/benefits_of_information_technology_in_healthcare.pdf
    • http://nizapowedasa.rf.gd/definition_of_motivation_by_maslow.pdf
    • https://uploads.strikinglycdn.com/files/df914cdc-69c0-4ff3-beaf-fa7ff82a2822/44089185365.pdf
    • http://latujetob.epizy.com/guzomas.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_off0001060c.bin
a7de9d98944be3eaf43680811443cfef58d7e66903f8a6e464599ac68bb95e2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 5300 bytes
font_01_sfnt_off00011825.bin
63cd0bfbac811b1cb7a900cdcd3042b8e02c3b63bf8394298c6f4df66c85fc51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 11524 bytes