Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d3d9ceb9ee7c53…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 01:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f9854baff03e72d2161121f3514d124 SHA-1: c8f1aca43c5a41e93466babe9cc4837491bf37bf SHA-256: 80d3d9ceb9ee7c5348cacc87751b1ba9a1719e1af82c37a1a96e2ca9b2eb7116
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to disposable domains, designed to obscure the true destination. One prominent link, disguised as a download for 'kali linux for android no root', likely serves as a lure to trick users into visiting a malicious site or downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://clearspace-design.com/CKEdit/upload/files/30647140876.pdf In PDF document text
    • http://romengo.com/ckfinder/userfiles/files/gaxipoxosedewedux.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/sawazaxeb.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/13873879464.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/jimafowomufakugej.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/vopekesakogefe.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/tujodolidibiganakelofu.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/32641358570.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/wapibetoburijudavub.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/54bab635c8ddaa2a3989499ebd2a4440/tagiwuni.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/zewaxivowem.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/dexira.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/kizunox.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613514258c9b4---tunisis.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/jodaloxeneweni.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/xizebesajenaremas.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/bogebedopipa.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/83881989744.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/wuduvaxow.pdfIn PDF document text
    • http://skisun.it/userfiles/files/kijakenogolitavukogawawiw.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/7995944335.pdfIn PDF document text
    • http://airzo.net/userData/board/file/6855105966.pdfIn PDF document text
    • http://warehousetraining.ie/images/93158616274.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/64284062759.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/fexosafirekofevorenewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+kali+linux+for+android+no+rootPDF link annotation
    • 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://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_off0000ddb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB1 10428 bytes
SHA-256: f17c9658cbc7f40b12fdcae345c96e65f2b323f4b735e9504fa89b58d2f77311
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D87 19084 bytes
SHA-256: 60a6d3d8bdd4b1c209e26ebb77781c93cf5b75cf7694426591ebe8d22dbda233