Malicious PDF — malware analysis report

Static analysis result for SHA-256 5017a741e023e929…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 16:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 62363c33554e2c29293dd73eb0faa4b7 SHA-1: db64b407c811329db452f3158b9f7e1b97bec7aa SHA-256: 5017a741e023e9290d34ddac593cedc5abbe59c192888e86e269ab512f49977d
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 result for a book, likely intended to trick the user into visiting a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest a phishing or credential harvesting attempt.

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://golowaki.ru/wix?keyword=contemporary+linguistics+an+introduction+3rd+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5fedf2c247de9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fee3d6dedc72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474478/normal_5fffee80e0cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_60291ec2f3d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_600c678a68b6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_60051430b27d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489050/normal_601f920323fa5.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/atlanta_late_night_spots.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/nuclear_chemistry_half_life_problems_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_600d60969b8cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijazofar.rf.gd/gafizowudelesozal.pdfIn PDF document text
    • http://dagogedimin.rf.gd/arduino_lcd._h_library_zip.pdfIn PDF document text
    • http://xabogubumux.rf.gd/geometric_sequence_find_the_recursive_formula.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_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 5644 bytes
SHA-256: d504762d11dc8cb20bcc29163673ab64a89461ef36655681e7d031172851ece8
font_01_sfnt_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 10240 bytes
SHA-256: ca1b4cb1cc67cf3272a6b44e653e4fa4d0c145446dcd75eb09c871c2575c316f