Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb063daf6504511…

MALICIOUS

PDF

86.6 KB Created: 2021-09-04 17:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7bfd38d2db8753421c7a5763d1d52751 SHA-1: 58c7f342ea641a6f3da734f567c69853d328d2a9 SHA-256: 1fb063daf6504511e1fe9cc4fb3a868735f44350119cb68feed2f82078a4c078
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9068e1702---89518444318.pdf In PDF document text
    • http://shop-cartuning.pl/userfiles/file/56320231029.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/pelevekisedekirel.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/jpt9l6m3eu0kmrp9t3ohghsbcj/53783230083.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/xekijorizebomewikenem.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/297ea3af4748958c004840c03c1cf55c/94975742092.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076b3e29f9ae---32311141876.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68b3a087e---32814415877.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/22185693677.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kixupidekakonapi.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/20023937405.pdfIn PDF document text
    • https://baongochoa.com/upload/file/87840585551.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/37136769738.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/15233442834.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/3069741957.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/22b8e4aa9e66e895bcc1af63d6792f42/manovevobanezaj.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/953e90a526c0c7a9f73141fc352e04b0/16068314694.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/93499348349.pdfIn PDF document text
    • http://mopron.ru/upload/files/15069404398.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4c689551445eafda4ca9900e429a18a9/buvuxufapukudaxa.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a231f09c---sisitofaribod.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/bofekujanudisoz.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/76189334064.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/47809859473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=giornali+gratis+pdf+2018PDF 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_off0000eb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3A 17724 bytes
SHA-256: a28d22a0c24bec7ee966e40b486ede5b9a83ff2de8914b75924f1765aeacb17f
font_01_sfnt_off000119ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 11080 bytes
SHA-256: c939cf80b0e801415b02b8dbafe02912c89b6cdee5d7e3bf32502712d067fbf2
font_02_sfnt_off0001337b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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