Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eaafa80ae01228…

MALICIOUS

PDF

93.2 KB Created: 2021-08-03 08:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01f3efc1956a64ca4972fc72eb10e669 SHA-1: 6943a2481f27ae5b264ffdf9b94fced7c8a4888c SHA-256: b7eaafa80ae01228b8bd7cd15fec5a73e8b84a26dfdcff1a335cfe9fb6ad6eab
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the URLs and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://laborke.ru/uplcv?utm_term=how+to+work+the+conair+steamer PDF link annotation
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/h3b8clgqar3gv2ca75t2tv57am/58616802615.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160830ed5ac221---budozit.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/xivojidi.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/59778019781.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec428257b25---dasizonasek.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/38785359644.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8230c576---69450450877.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/3cc49f7d6c06f45926c0c1eee6443779/mudisita.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/bamujirevekiwurelopi.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089101fce674---sowato.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c20b9c57---86918634686.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/xofefazuwadosom.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ea7117dc60---laduzatediwusepogexi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1f11e03947a78752ed8a518b485405cb/70795386556.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/30797593356.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/zadagurafeperiwixeb.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/22923847208.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606da06906c19---96923918795.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085464fce612---91385421542.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/gazajunevovimuture.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/rakoxub.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47cdec1d75---70468280766.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/m48reo08clau7hacok54vo7qf3/nulavofutafaz.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/gexuvogogiwifu.pdfIn PDF document text
    • 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_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 10620 bytes
SHA-256: e1995fa48d4256d132ef6e2383081a9e6c153535717b9760914e51c4d3da5dab
font_01_sfnt_off00011fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 17296 bytes
SHA-256: 33062af7ac9bef782e01f0c99eeef6362e8af410989b1874b4de15aab24ee0d0
font_02_sfnt_off00014d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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