Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddadbf0ab60e2a2…

MALICIOUS

PDF

76.1 KB Created: 2021-07-18 00:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 26a1e2c33f858614c77b77974580bd53 SHA-1: 3d070131b4c11fcf6386a017a9a672c164d6f511 SHA-256: 2ddadbf0ab60e2a2081e25514f8c38e1f5ba17c928681b19d3a5ff267582f799
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the document functioning as a link farm, with many URLs hosted on compromised WordPress sites, suggesting a phishing or redirection scheme. No scripts were extracted, and the document body was unreadable binary data, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c6e1dd37---71225649064.pdf In PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/8bc27b16d09fd70c6a00184a2c603a10/29671787811.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0559b0f4df---povixulasisuzanebiwam.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d46dbd0a3ac---97887566313.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/93643096390.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/suravopulexirevubowawew.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9707fc67cc---lufan.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0b38e9735---jirezoresafidodo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83614d6f2c---67697725645.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a00b9561b70---1050208815.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aef4bf2381---tewoforo.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/funosabelu.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/rawiga.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/51385269678.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3e810868---37171900555.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/80837131089.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/16f933fff8ca1c475ca8df8247368f0e/rorigexal.pdfIn PDF document text
    • http://xtra360.net/campannas/file/vojujuxixafepunifo.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/fimaledewe.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/kamomum.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/rimiwuxe.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/34284735383.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/27000837700.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/xudot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+hanging+tree+pianoPDF 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_off0000c5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 17656 bytes
SHA-256: bc1ee777eab66a7db1311b4063e41b0fd87f610cde6e1dc65310d7007f1c8b08
font_01_sfnt_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 10280 bytes
SHA-256: 6671e817f31cd467bab525e7bed3ae0851293d63e39bea04550bfc443369f743
font_02_sfnt_off00010b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1