Malicious PDF — malware analysis report

Static analysis result for SHA-256 957a7f37bbcfd432…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 06:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7121146ff8e5bf6e8b1aad11a3af706e SHA-1: 9ef485a8b3bbcda4b606bf2c8b7d2d0e7ae6b97e SHA-256: 957a7f37bbcfd4323093496e8212e5a8f332dd8fb6e5338e7035f0215ffc54b4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to suspicious domains, suggesting a phishing or credential harvesting attempt. The presence of a 'utm_term' parameter in one URL, combined with the link farm heuristic, further supports the phishing lure pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://circolosilverblufitnessclub.eu/userfiles/files/pobewunalawejuzabamolikim.pdf In PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/19519967518.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/81248319283.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147f15e71ad5---14141500262.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/buraxazikipekidojuxewasa.pdfIn PDF document text
    • http://bdsductri.com/upload/files/54982972093.pdfIn PDF document text
    • http://polipack.ru/content/file/29031755983.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/lowibimizutapevoxal.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/77521527556.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/pimemobufatigajira.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/85372489724.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/filifufejalijetokawixab.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/gowejo.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/najuzejevarajokabog.pdfIn PDF document text
    • https://henuopack.com/d/files/79781928650.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4b53eea8---rizupivenuzuxarevukosix.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/96198934640.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/bekatosivamazetede.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/mamusupigilafabu.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/xefiwufodekuf.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/daluje.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/72413793651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+download+zapya+apkPDF 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_off0000d0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F4 20796 bytes
SHA-256: 99e2f5ebf9b0d454c666bae1897a4ac288313403d77fff565f13bd2e1bf494d2
font_01_sfnt_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 10356 bytes
SHA-256: 201a1f1df57ae97cad9950a6ede96c8683366af8bd3d98cbef0a7604b27f2fb1

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