Malicious PDF — malware analysis report

Static analysis result for SHA-256 2199f1cdd90be237…

MALICIOUS

PDF

85.5 KB Created: 2021-07-19 21:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae2b944ba0a53ae4e7bb1252d0f1a4fb SHA-1: 0e0b045c8a7e1325436cdaec06ad9dba361b2991 SHA-256: 2199f1cdd90be237119c336d6b9d4a83769f4fb978324c2ae301b7844821d34f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, potentially leveraging embedded JavaScript within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a0cc8abc1410ea1aeca9087c6032ce6a/22730233024.pdf In PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2ef2358b3817c4783aaef8d228cd3562/18642187377.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/nukidonerosozigesefafil.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/e71fcf08c578fec172e6089a5571b1c5/zuzewomuxifigaxovonedano.pdfIn PDF document text
    • http://kaies.net/upfiles/file/dasetivubixemobosovisuk.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/33492526231.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/fexodagegi.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210616_FEE8C956DDC38C84.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/pateriluxemekelega.pdfIn PDF document text
    • https://thehero88vip.com/ckfinder/images_store/files/50743806666.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608abae60c5d5---sikeritasulawuzozubesagiv.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c26f389d0c9---xojix.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/72c0366e0018fb18eb6dec18e2fce2e9/zepazuwufufidebotutib.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/c4i2i9jsunt5iinj8sl0a2nvrt/binuwumore.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c229a4cd70c---zigir.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c819a8c0e---zemufisanadolowazozo.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/3325334523.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/bepawirazexu.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2861dcd92---pufexubepeledosimolidoru.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/73696819483.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080c1a4aca1c---33811844411.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/xivoba.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/kaxaxexegipizijatofa.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/79228231613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+velocity+time+graph+for+a+particle+moving+along+x+axisPDF 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_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE17 17732 bytes
SHA-256: 5705ba1aa743beeeeb3c40486f09d096b65316bc83c491b144bc3452f6244b7e
font_02_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 11172 bytes
SHA-256: 0e92de725a7d369d079bc576fceaa45905edf0020cdb2332fbb41d2acdaf2199

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