Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb1697a5c41f11a…

MALICIOUS

PDF

68.0 KB Created: 2021-09-24 19:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0bcc5a8f2edf9f3ae3104f2ca0505568 SHA-1: 10fdfddd9d58e57ba17f833058c1acfa1f062a42 SHA-256: eeb1697a5c41f11a7084600373596822d7531b23b4110fd484ef06e8be5a00df
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a phishing lure due to its image-only nature and embedded links, a common tactic to deceive users. The presence of numerous links pointing to various domains, many of which are hosted on compromised CMS platforms, suggests an attempt to distribute malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent, likely involving the exploitation of user trust through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://woft-dining.com/webroot/editor-uploads/files/22269641595.pdf In PDF document text
    • https://contabilidadegoncalves.com/fotosempresa/files/32035718603.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/siwujosobugaw.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/vosulapukezesejufok.pdfIn PDF document text
    • http://ativn.com/upload/file/xuzubazakoxagomaxi.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/35526496095.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/veperuvagasi.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/56149560984.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/gofarimipevivuz.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2c519841759112219808f07a4730b64a/89594597163.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/7663588252.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/wasinowonezogose.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/mozedivawejegime.pdfIn PDF document text
    • http://ge-mak.com/files/kebajo.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/12772027925.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137dff2958ef---29446872228.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/80748209501.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/texugedalupanavadonepad.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/329ad64d693c7234e9406e87468b4204/siludoxulubajanekena.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/94924401824.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-7/20210907152109608142.pdfIn PDF document text
    • http://em-ail.ch/pictures/2/65087043096.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/17656946664.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/41522924491.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+free+strategy+game+for+androidPDF 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_off0000aeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEA 10820 bytes
SHA-256: 3cdc0ded736e70073bbdcdb0406e3571eeb734228fa90018d3bdac041a54dc76
font_01_sfnt_off0000c7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B5 13936 bytes
SHA-256: 30d6330d5af35fa43d2e1e351f1a84d4e0211ff8b8cdc573fc1010713ea6321e
font_02_sfnt_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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