Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0dc427452783d…

MALICIOUS

PDF

90.4 KB Created: 2021-09-04 07:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6d1231469f17d811719dd698d3741c40 SHA-1: 85b15ef167725d2fc7e3cade0098513d542ed61f SHA-256: fee0dc427452783df61ac0e1f2376bbd32bd74bbb07119cb762a906c232e28ed
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hotelindigha.com/FCKeditor/file/26784214063.pdf In PDF document text
    • http://sitoad.com/bbqjoekey/files/202107061411288253.pdfIn PDF document text
    • http://mlead.net/images/e/file/visevuje.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/10081989378.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/37349484205.pdfIn PDF document text
    • https://norservis.com/files/files/pujodedisigape.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/nexigizilose.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/mixoborex.pdfIn PDF document text
    • http://gptools.net/userfiles/file/tiwibujefajazulawe.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c00b80670---ziwifej.pdfIn PDF document text
    • http://dentherapia.hu/files/file/bufobupovekekis.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/52002635271.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/28684008737.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/34186086876.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/34084269648.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/fegevevabupaxe.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/25438947973.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/3420951832.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/71748642104.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/kulenojitapafabeza.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/vabix.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/juxofuguxete.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/fuzara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=vector+analysis+pdf+by+schaum+seriesPDF 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_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 21112 bytes
SHA-256: 6ff46109d41c990814eeb1fd8588b5e4f3640eeced57cc762a4434d8a2804d42
font_01_sfnt_off00012a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14225 11208 bytes
SHA-256: 54616596ebca42b55f95b41d678c22d6b3fa5de5e6f471da1430cb68be7deae2

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