Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c45d3d0c9df1fcd…

MALICIOUS

PDF

69.2 KB Created: 2021-06-30 03:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2affeb282dfff0e4f75df777f0428adc SHA-1: f8b341879bc4cdea9080b9030055618d03ee871c SHA-256: 2c45d3d0c9df1fcd850cd6e03c0a2b0772da183e0e0e665503e80a044ed972a7
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. These links are likely designed to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d6689ec06bdeedbf2e647d1b26181be9/36474498192.pdf
    • http://atol-res.pl/uploads/file/xetutomuluwozezufowedo.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160795ce8d5016---72101509664.pdf
    • http://collegium-connect.nl/ckupload/files/zabodobonurikasagunepomiv.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ad8a11d6d67ded242f5560bd0b5f5fc/32167832049.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/4830368b8fd359f2d4600106807dfef2/30795161828.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b97b115028---fujukekijewelukesuwopuru.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0c819dfa---48235942459.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a4329741420---voxidunutebug.pdf
    • http://curry-box-deluxe.de/userfiles/file/36551814357.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4b7686bd327549ba22b4cd4aaa6120e/11483735967.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a62bda35f3a2ab96506a3238ae75f625/xafuwilinegedomakej.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b7438144a---11001700079.pdf
    • http://lideparts.com/userfiles/file/1621452167.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16086f25b873ee---kulaxasamutuzajix.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d8e78714c---suzusurinomefewunojorif.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160879fd703549---novibisabisarijivinuxup.pdf
    • http://sofia-es.tokyo/yamituki-n/uploads/files/73869093098.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb84be1aee---73065415003.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/64d1f2a801931d192b1d75b94048edea/wakogifojudagigibul.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5355102c---nulewewapozexofef.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/50293425227.pdf
    • http://ackerviewguesthouse.com/userfiles/file/7937331485.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083547e4de46---tukol.pdf
    • http://ahcxdq.com/uploads/file/031758099931.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rational+equations+and+rational+inequalities
    • 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_off0000b4a1.bin
6f53954b26ca21d80d97df468db739243f1027e20535e8c416a567430fac96cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A1 10532 bytes
font_01_sfnt_off0000cc88.bin
b40f63a42563579b9cc96c63170a742825024af9721d5f14cc5be79d3b791f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 14044 bytes
font_02_sfnt_off0000ef48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 16792 bytes

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