Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a23cb213ad4fc7…

MALICIOUS

PDF

73.3 KB Created: 2020-11-24 11:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 096b7a9202e6efbbc5b467ff51c5c272 SHA-1: b9392d8ac19f9c0849c0045e456e06d192966784 SHA-256: 56a23cb213ad4fc7b0adef0c1566b11e4e930bed96c1726f4fb6ca0977f5090b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a phishing page or download further malware. The document body, though heavily obfuscated, suggests a theme related to 'Android pie captive portal detection', a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=android+pie+captive+portal+detection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392869/normal_5fbcabb189a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5fb8d97981175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f88846f660fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f93e2a33e668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f9dc4bb7f3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5fabfa8e22430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/learning_python_o_reilly_6th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/lugimofixewajiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3c3b21-1e46-4c8a-a2b5-3eff03197f78/87088494960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d42a09-a7fd-4c64-8c83-c20d0f6d2cf9/wawegapameja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5056d02d-03c3-4169-b147-12cf7a3f0408/dream_car_racing_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/85537758283.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/bad_grandpa_free_online_123_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/32749261088.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/98428505202.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_off0000e222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 4936 bytes
SHA-256: 422aa4af49d8a2bb098a3ac49ae3c1d980abb94be16b1cf642db8f5023d2f4cb
font_01_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 10812 bytes
SHA-256: a89aa6bb46a5031727c8a920818f6be6ef2bd67ea490d9e0dea1921e0e1d3276

Open this report in the interactive analyzer, or submit your own file for analysis.