Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4f5a0948305b29…

MALICIOUS

PDF

416.4 KB Created: 2021-03-23 03:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 31b3633ddac9e47e80b53a462c228e43 SHA-1: 95132b77f01184bc406023057e18fddff27d7a8a SHA-256: ab4f5a0948305b29dddf4d7678ede93d0e653f0e3ed8892492d78f5148d5562a
96 Risk Score

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 pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to technical or academic content, designed to trick users into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8906

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://resalured.ru/strik?utm_term=using+the+method+of+joints+determine+the+force+in+each+member+of+the+truss+shown+6.8 PDF link annotation
    • https://cdn.sqhk.co/topazawu/fslNqRy/bovawibepozuvotumusawufop.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/6367868.pdfIn PDF document text
    • http://italia-doc.space/digestion_de_carbohidratos_lipidos_y_proteinasx9tuw.pdfIn PDF document text
    • http://the-job.ru/xazukexevipimawubawazavildd6v.pdfIn PDF document text
    • http://theplafond.xyz/dobizuxovijusunomijokmf46.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/fexebojovaxozivusid.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/gjfYihD/hitman_3_gameplay_vr.pdfIn PDF document text
    • http://plusstore.pro/50478525950k6egm.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/hfiaZTp/is_viral_media_boost_legit.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/xibuzezu.pdfIn PDF document text
    • http://mastera-saydinga.ru/jajabukomiyxg85.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/zurawige_sexepokamadiz.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/vinupozatikuvali.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/51393786c.pdfIn PDF document text
    • http://natiral.space/film_khasi_jeff7bxib.pdfIn PDF document text
    • http://kikudesazogug.22web.org/sapna_choudhary_song_pagalworld_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/jrhe5XK/67141448510.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://pojasulexubu.weebly.com/uploads/1/3/5/9/135993084/wisoxaruketalubu.pdfIn PDF document text
    • http://5coupon.info/best_english_learning_books_in_hindiz0x7x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kogemevegij.epizy.com/resume_format_for_teacher_job.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/canon_lide_700f_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000617d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617D4 6080 bytes
SHA-256: c04f5cf31ee0cefdfc0fc48d045c6f31a399b84bb0743d504665f5b76aa5e60a
font_01_sfnt_off00062c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C74 12952 bytes
SHA-256: 51227b719405351aac1a733606e24eb466f1a97b60b97c1fb75de6513ca8721e
font_02_sfnt_off0006583a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6583A 16296 bytes
SHA-256: 05a62990db9ae9b4948237fc8f0291e4336237a94e1ff47eab2d6178d3b9dd23

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