Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d9f69580b4941f…

MALICIOUS

PDF

83.8 KB Created: 2021-06-27 22:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39f29e35b6b6a52d18d0dab2a1a074b6 SHA-1: e9b4870ccc7c41ce74be6cc2a03140a5fe47f0ec SHA-256: d9d9f69580b4941fd44fa817f7fd1d9180e9f4c170f3376fcdd973f362c99354
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that lead to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6a390111c8db14edd0089048ee1d0808/49288768550.pdf
    • http://goodtraefarm.com/ckupload/files/waxesigasupamow.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c873390c86a---31650540377.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/c80147cd89febfc041d8ec691cff3411/wipenumeposaze.pdf
    • http://location-appartement-venise.com/italie_documents/files/60417568727.pdf
    • http://twothirdsmajority.us/clients/38522/File/sabusibibovifopukozirivus.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/559bmktulosahbnjt1tcokluci/79040693752.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/665b8b9527e6ee779def8713774c3f42/56229613646.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d88b5161b5d---rejaxolivovemijovagem.pdf
    • http://senseoftourism.dk/userfiles/file/62787185102.pdf
    • http://topcudental.com/img/userfiles/files/zugifi.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f51bdf1bf541ef726c9744453cd070fe/30170750826.pdf
    • http://dakhoanhanai.com/images/files/74705748313.pdf
    • http://fra2ange.it/userfiles/files/jogatibonobowexo.pdf
    • http://sgd42.ru/userfiles/file/48112690138.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/57c49780e67070bcccb0c543485362f1/64265110418.pdf
    • http://abc-tel.ru/data/File/75098166984.pdf
    • http://sun-tes.ru/files/file/27352608093.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/f4q7p9p9l6r812j13o18uj084d/gorobiroxosaxirifebatipuv.pdf
    • http://baraanduliaptti.org/userfiles/file/kunapakevuzab.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1206c96cda---nusikemirerimi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=performance+appraisal+example+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e429.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 16792 bytes
font_01_sfnt_off0000fc3b.bin
02d3b83eacb1cde1ce98df8e7207b513826273a6b29e0dcf3ddd9eaebcd19763
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 16752 bytes
font_02_sfnt_off0001279b.bin
729b96e1897115526b9e3bdd89f03ea9dd204775b6f5fc3f245743138bc22702
pdf-font-stream PDF embedded font (sfnt) at offset 0x1279B 10732 bytes