Malicious PDF — malware analysis report

Static analysis result for SHA-256 188873c531eb170c…

MALICIOUS

PDF

73.3 KB Created: 2021-02-21 06:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1bdebc4598a33f63b82a9adb9d34cf45 SHA-1: 530aa60beaa4c0a66400e7f939b189252ea6fd90 SHA-256: 188873c531eb170ceb21a1cd1d44026b715d845b9b4fa0c252e44a6cdfcad20a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/strik?utm_term=how+much+water+does+a+he+front+load+washer+use PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498971/normal_60015a3e597ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5ff613a06ce3a.pdfIn PDF document text
    • http://kefinefure.iblogger.org/french_language_learning_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_5fd965d0379e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5ff5f9a8ba113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fe6fb8e8abef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374520/normal_5fe0172e44014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_60014fa66f916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5feee82e08901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_602e212a74af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_603188a7a7515.pdfIn PDF document text
    • http://physcoo.com/in_the_end_mp3_download_320kbps_free_downloadbo9ve.pdfIn PDF document text
    • http://dfwshootersupply.com/fafifakulovud0hvxi.pdfIn PDF document text
    • http://golden-bridge.pro/8981356331ytk15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_601ce29c32f12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_5ffe49bd85101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fe9c698f3247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5ff501d4ac68a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_60252fbd8d9b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5feb15f017d1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibelobal.epizy.com/97473218893.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/55154150738.pdfIn PDF document text
    • http://sugototuvomek.rf.gd/oxford_english_dictionary_format.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_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 5316 bytes
SHA-256: b4c63d55f9aacca5ef11600502cae76f2284505350879c9e486eb38bb090d2c9
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 10436 bytes
SHA-256: ed7efaa927ec5ea7cecd0c82e8845679f217f8a746b19f256e8a6a21d9c06e04

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