Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acc0e44ee759cfe…

MALICIOUS

PDF

86.1 KB Created: 2021-07-31 12:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17d377f505c6ff7c6c57ce494a5a7bc6 SHA-1: ae34ec9ab3b0b8d3c3455d4958c0f4fec4a0feb9 SHA-256: 1acc0e44ee759cfe7260b4584ddcc77ba82146bf24a1b0c3dbe68fb8d6d5a533
204 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a remote support tool lure suggests the document aims to trick the user into installing potentially malicious software. The document also contains numerous links to PDF files hosted on compromised WordPress sites, indicating a link farm used for distributing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/5e38585pcu8vllfocek7m8gnia/xoxavugado.pdf In PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/44265623128.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/lamapubafe.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e757edef5---jugeze.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/18396461210.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/281459e6b2a5d34e365771bf1fc5073b/garitavobibunetikoj.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/91683153994.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd16ada88---63387695871.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/97065832924.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/122411282791a29bc3294bc989ff3bb5/jabag.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/savawowigol.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/13910007276.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/pifewokixa.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6a60120eb4a8da4ab66bbb04363ab72d/vixuxuga.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/40275949005.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/89846a7bf5891c67ef2b259f4da78e7c/16555564924.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/lavajadovelabuk.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d3020ea2dd9ee8055245beefc156868e/84341943515.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/kipudop.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/011011f0c84b890ed755b7a0f85c69a4/53910975752.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210723083644_wi84fl.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54a43c2ab7---40958157150.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d681795d82a08ee2a24b0387d6ede7ca/20301890634.pdfIn PDF document text
    • http://builderall.info/userfiles/file/59042972289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=awards+ceremony+program+samplePDF 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_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 16848 bytes
SHA-256: 0ad13460664a94294e36ccf67504debc6801954c4e3c346ae75389ea864d4b2d
font_02_sfnt_off0001318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318D 10848 bytes
SHA-256: c9b0e6d4dedbc6f73a2b629316a94a0ff25542ce2f0b02cbd61c5cfa8d4c7e30