Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2d18e34ceff6e0…

MALICIOUS

PDF

74.0 KB Created: 2021-09-03 21:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9e9ab65b90dfbe1272a0e49ce0f5a2c6 SHA-1: e29cdcdcd2621e99b050ef9fe745b35dac2eda5f SHA-256: fe2d18e34ceff6e0401a2b3eaaca6d4434ad2ab0c071c6cb5543bedc110f7319
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages, a common tactic for initial access via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3sigim0l33u57env8v2vckomt3/45379302231.pdf In PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/44b331c14f9ab3244906f8d8d81bed57/2491822264.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///pexikopexakofemofiwe.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/pijelidugidu.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/vazavaxekisetupenuniku.pdfIn PDF document text
    • http://www.centralperdana.com/file/69964546450.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/sobiserizebesokudowuvixik.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c434024e871---82242426756.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/0d4no277fvr7gmccke3sg0b4g7/93881228292.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/40190014622.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099103b2f0b8---dedudomo.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/18940498684.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d848554f995---vebutuvijumu.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/nidodawof.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/12229557111.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078e57a6f0ca---tiwukoganokuku.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610071a19fcf3---bazoninijagesizativuja.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202107221102514483.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b037cb7b71e127451508cee1ab54e619/ledadipozemakeboxatudet.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/towujatafagovexad.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/seronizudamavefi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5773c5be---88698721912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=stratagene+quikchange+manualPDF 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_off0000bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD3 16852 bytes
SHA-256: 12102ee067a7b005f5c8906d27ee9c8d4f65fdf6261386a81bd3d5bbc9451c98
font_01_sfnt_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10800 bytes
SHA-256: 7a24539b4724c7bb3d76f9bf5190b944b5193d9ba6810832e7ef29450c9ebabf

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