Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f00d083c222e559…

MALICIOUS

PDF

85.0 KB Created: 2021-06-23 20:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 47c5c6a44c96df7d0e4891571a9c6522 SHA-1: 30707ef68e6861bd1b1d560a3e0fc2affd9c2679 SHA-256: 0f00d083c222e5599b2ec8b2263d8947c6620c6c09d5b1dc0c76f2e5dd82e7de
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with multiple heuristics indicating it functions as a link farm pointing to compromised websites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it is designed to exploit users via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://abhimaninteriors.com/ckfinder/userfiles/files/tidatetolojusipuwefebib.pdf In PDF document text
    • http://adabaskimerkezi.com/upload/file/82219793328.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/74ab7ae15395a644b732fdc2b2ec4a28/43032135439.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/18596110894.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ddb2116d8---ziwekafowamivor.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d216c65e6---63983362487.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/63ot23fbvkem7kj9oh2gj5bkl5/zasewuxokojuvetemajidi.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/caae0c2d8ffb1839162a56c84b1edc55/12170395238.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/f8501e988f72b24a5871fce36f950b27/63321507290.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083e44f85a76---67623361874.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/84057443598.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/sizedole.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073339ba975f---68665935042.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/fpnb5aq3a0859umrprrb7no797/30835752163.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072087d9013b---10493204264.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/44580031597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ms+6547+motherboard+manualPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF36 5492 bytes
SHA-256: e8840751219e609c38bcdd38efb9d39736045862d47be851e64a9ace11b4ff4c
font_01_sfnt_off000111c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C7 11484 bytes
SHA-256: 1ae011190501dd42c7ccadd99241625ff70e6f5f24883128de0d5f9cf8be87c1
font_02_sfnt_off000138e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2