Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef300cafeb224f10…

MALICIOUS

PDF

75.1 KB Created: 2021-07-21 23:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e546a1a652a7fbfba457008dce9d657 SHA-1: ce77a437564cbca569b2c95734f3affa549297bf SHA-256: ef300cafeb224f10be930da9df5277b1039c24343555f87b7b7d121ddd0c83bd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://hotstamping.pl/files/file/56408958553.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a0742195b11---karek.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/69404069409.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/28e0affd63d083efc1fd78cfca6bcb7b/93372299132.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608548b6a5d96---xinerokovodowaruxokikozu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/1m37tr9re5p12gcnb3ir2a7cqa/witiliguwegej.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/bubuvagozekakajejukeja.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/somikomefofowivujakabunut.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/udjlo7mu79javnvgl9n76s316p/julelugodikakavurere.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607697798e6f4---82740032411.pdfPDF link annotation
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/edaef1672d7de952a53b351ab3a5b1cc/zegigivewatibof.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/40907633716.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/jevir.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/65271176959.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/af0c3f6234c84a60cdd5f3ec4299303e/nokuz.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/mixejup.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/dubobenopepuwawudeborog.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/sukurodama.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad55129083---43136423260.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210604120001655503.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab51eab0c---1403076778.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f6fd54872---73990374489.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a125b6a47d6---75610292633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=miss+you+smileyPDF 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_off0000c3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 16776 bytes
SHA-256: 70581a49f4c20ef833275d4775a7d9ecfb6bfadbff70d44afb4f992ad178b1ec
font_02_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 10012 bytes
SHA-256: 093fb233b82744ecd6aaa7b57d5fe68d7538680a2ce2f7d28d97d08ba4010ec8

Open this report in the interactive analyzer, or submit your own file for analysis.