Malicious PDF — malware analysis report

Static analysis result for SHA-256 69345a56edd3d446…

MALICIOUS

PDF

87.6 KB Created: 2021-09-14 13:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de834c5e2397cb76142ad2a29dbbfada SHA-1: fbce76048ae836e095ceaea19d6dfaecf6d479ec SHA-256: 69345a56edd3d44669a405d9fc291caf4e06a62980dd9ed7662d121c142a8bc4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://beta-rc.com/upload/files/14725722957.pdf In PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/ruzodu.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/kunofetikapufele.pdfIn PDF document text
    • http://shahgrp.com/uploads/20510909106.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/butubexesajavebolexezisi.pdfIn PDF document text
    • http://chinahongji.com/d/files/gilavutoxelozowopon.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd374afdc2---55271672970.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/33427819570.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/23303584334.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/84378083145.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109120829371665.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/zafazaxaji.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/sowiti.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/gujururujogebaketukovid.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/dofomefiguk.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/30377695427.pdfIn PDF document text
    • https://angkalaris.com/contents/files/xawomagezugoporunifuz.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/52301234753.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/1292928236.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/javuvebepivusolowisan.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/82604062259.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/faladolaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=no+audio+android+autoPDF 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_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 18408 bytes
SHA-256: 2b6d91c60ccba4bb7c45d2abb13644b73a96d935ef78c172781e6997ba7399aa
font_01_sfnt_off00012322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 9972 bytes
SHA-256: 3e653c4436181b8acac449bdf4a03a897fe35d3cc9ff51c8a08dfd114a041e40
font_02_sfnt_off00013949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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