Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e91d50db646492…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 22:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fec6cc03ac478f99cc78b074f311afe4 SHA-1: f4a372bbb9ef5f4990e852216aedddf1b7a53ea5 SHA-256: 89e91d50db64649273e8376b3801171f247d881df7e41cbc48cf7ef5cf8024a6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and a raw IP address, suggesting it is part of a phishing campaign. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://kpghomerepairs.com/uploads/image/files/bikalawazijiwakozamivopi.pdf In PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/lubilekaxur.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/vopaxosodotejake.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee274da3cd---59542022794.pdfPDF link annotation
    • http://kasaitogo.com/uploads/files/96238945393.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/90817102415.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/6991900531.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/tujavijinelofumof.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370ace0c78a---81557496389.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2c3423b78b3dda4118d95e0f835ffc84/vujuwigakekolidufex.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ff708af40---10107775089.pdfIn PDF document text
    • http://esangsok.com/upfile/files/lururalilifad.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a6d6af974---62460781322.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/44231213063.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/15d229849717b00577923defe7c7373e/ririlumixavozuzagim.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/jojuduzu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614804dd63d82---jujolevet.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/dalofuxidatomelisixasufo.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/22528011774.pdfIn PDF document text
    • https://mytopics.it/uploads/file/fadipixeva.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/nodavojafanepurepaji.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/ninexewijabapivu.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109151624493284.pdfIn PDF document text
    • https://transmilenio.net/datamont/userfiles/file/81467752125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+know+visited+your+instagram+profilePDF 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_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 11292 bytes
SHA-256: 010868cfe21e76de83621c068c2b4863c4e946a7b2f080cb74ca18deeeee63b5
font_01_sfnt_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001133d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133D 17632 bytes
SHA-256: c6b60e9d4733f0c84c0cb6f52a561b9318b87b1ef7047b66ea29c992743feeb7

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