Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1aeeea242470361…

MALICIOUS

PDF

73.1 KB Created: 2021-09-21 16:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 14fb3d1fc4ca3f206ec711c3cfc22911 SHA-1: b4847a8bce4421b48e875116d29ecb69a59cc934 SHA-256: b1aeeea24247036181d0dddf04e4bff9a05fb3e5fcacd3de6533845787750981
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.shjkyq.com/up_files/FCK/file/nelivemuxanoginebali.pdf In PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a94353c79---11875139319.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/11074414459.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/petexekiletuluzir.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/27875169688.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/79231169122.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/39212080102.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/47040641523.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/64986266271.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/valexapukufafapin.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/29022589227.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tifixexejijotadetev.pdfIn PDF document text
    • https://bunianco.com/other_files/File/lademogo.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/nasomaw.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/72756857950.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/20350929609.pdfIn PDF document text
    • http://husplaza.hu/editor_up/fiziwoxe.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/kuxez.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/95154395805.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/35397999438.pdfIn PDF document text
    • https://conrays.ru/f/data/bewuvilotawusu.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/zigoviparege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=high+plains+drifter+online+freePDF 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_off0000bb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB44 16632 bytes
SHA-256: ff8177ec8088944b1602e668cf7ce3e1edd192cf2b9767b0341635ac27fb0063
font_01_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 10768 bytes
SHA-256: 5b28278afe416366daeb1f4a3cfde8bccd2ef8ea4a9c36532ddb0b5753182934

Open this report in the interactive analyzer, or submit your own file for analysis.