Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb7ae83b26d40f0…

MALICIOUS

PDF

75.3 KB Created: 2021-09-20 07:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 644168ca0100df5bef9aa7543a9714f7 SHA-1: 5e99b6e0fd2f4f17d1084ad74f41716f8def289f SHA-256: 0bb7ae83b26d40f04415772adb7179b22d637098d12a14708d2e45cc0d64afbc
156 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://meyergarden.com/ckfinder/userfiles/files/fuvesubefadojuwopawemoj.pdf In PDF document text
    • http://boilerservis.ru/uploads/files/11458587969.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///40947645910.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/gadusat.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/f7e93ac7918895f086af9e9784218180/35535695648.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/rorifabope.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/16f8b029ef80c8f2e4af38f4961db69f/34343674054.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161340a9fe78af---pibotafimi.pdfIn PDF document text
    • https://fobh.net/userfiles/files/baxigagozizevuwajifelura.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/32911824319.pdfIn PDF document text
    • http://wsm.hk/images/files/54493747466.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/49032830774.pdfIn PDF document text
    • http://one9five.com/userfiles/files/dufenirixote.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e96a59e610---buwofubuwezaxu.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/40989916801.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/42252145691.pdfIn PDF document text
    • http://gojjang.com/uploads/files/18041140833.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/viwedoxifuju.pdfIn PDF document text
    • http://signauction.net/userfiles/file/71891286831.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/gefevomegolenigobepex.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/11636243236.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/xamifazozukubom.pdfIn PDF document text
    • http://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/60134911537.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/varuteporoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=maze+runner+2+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_off0000c308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 17700 bytes
SHA-256: 85e5ef7d553df041853d188fff779ad093e31a6c7d226579cd439e3baea8906a
font_01_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 10088 bytes
SHA-256: 0d34f5ba999cf51c5d59950202531c2f65d15f50baaa8ff3e4fc9535b8e0ea05