Malicious PDF — malware analysis report

Static analysis result for SHA-256 363ae63fb6a2ecae…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 19:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8219a18f85382229eedaad49a285f09e SHA-1: 74889df1109c8606c9370aa4da8f87ff02ca7562 SHA-256: 363ae63fb6a2ecae6fd7e6efee6fb683fb58e50579d162b631795db7e3558de4
156 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to multiple unknown PDF files hosted on compromised websites. This behavior, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the structure indicates a malicious intent to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/a9a1e8e9c59542c6c9019f3a2e4e4a87/wodibijopem.pdf In PDF document text
    • https://daaeportrett.no/upload/file/kixipizexuvawuditux.pdfIn PDF document text
    • https://argumentua.com/i/file/galezexanimiwudina.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7dfc1fb1---gotif.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/witavupabebanavibarakivu.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/41078870217.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/52d3769cb3a193a4254cb362fee00f5a/54626715134.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/lusogu.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/24663258732.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/dilenelezovit.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73ccb8bb5c---nuzejoratubotafexobobizen.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b505263fdcf---suzapaposo.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/xujawovavomulogu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tdr3itlfhneq5pku089t29nd19/39835289347.pdfIn PDF document text
    • http://web68s.com/upload/files/nofevufipakububib.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d79a334debf---46258038481.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b327df4435bc20fcda27c0ef0e19b413/pelusowigipatupibixebizu.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/nhmhqjj8e7enibjne02ntpfd38/zaxokisexunevegakijiw.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/649a738066bab26ba1a0ebb5cb3d2477/gonapax.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/vamalukodiradifujelusisaz.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/t6mrjqccn595ck9ntmhb5o8bsl/21305241026.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/97599318258.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/e373ecacc71c7d28052a5f611ca2ffee/7114299404.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/22c44e77860f487388b69341264aa0bc/54127427355.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/xilekivabizufemuliporu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=isaiah+56+the+messagePDF 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_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 17964 bytes
SHA-256: afbba80c9180cf7ae8c20007ea2dedb6ae497ccbd98d50801e6484c27c5f8ca2
font_01_sfnt_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 10436 bytes
SHA-256: 7cdaea182208c1f0e0a7136db8e908ec11451885e28444bef2bb6b0182ec4c95
font_02_sfnt_off000132b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1