Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2208b4a86434064…

MALICIOUS

PDF

84.1 KB Created: 2021-06-26 03:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4e1eabafde54f35f03c5a6658460b12 SHA-1: cd8f1fe19c026b9a0a3d19fb8cde6079efa0b3f3 SHA-256: b2208b4a864340644fff96a0ad1cef1432f768cf3f2b748f5d298d6e67d4857e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports a lure-based attack pattern. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=sorry+song+justin+bieber+download+mp4
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6bac8d7627ee18cca0aa2c4f52847b14/45395674803.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/9hr0lopf83dmai208v6bhe12oh/4296571690.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085bc5468ec0---36011922965.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e929d5ad0b85121795b1eedd119cb47c/kutukuwifi.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/zepeki.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/anc9hkvgiu7k445mu7tenj5rr2/28598569526.pdf
    • https://ascinfratech.com/clientprojects/trading/file/fufizuxobi.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f3f76de6e---direkuva.pdf
    • http://mcutech.net/upload/2021/06/file/1622989225604851732.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f2ed06c3---95297974647.pdf
    • http://kleinschaden.expert/userfiles/file/kadavibuturegewam.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/desasedewajonarodabo.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b209c37532d---71274637379.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a48011639df---64641352198.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/0a03b28d2a01b0c572ebc6aa72fe274b/99239401158.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/74d765da3d8dde28fb9ce850ce384eec/76448269932.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/4db056076dc17490b2fe14360954a158/lekovi.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c95f47ac6a8eddd3bfae21c32d3a4b39/jajorejozugikijugetufax.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/bnjlujr5j4at5hoaca3nq99odc/gawapavekixevabalinasixe.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9608c7ec---85546170730.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac576cc6cd---sabusaxavodopuzavadizosu.pdf
    • http://dinskayarealty.ru/media/file/75339176372.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca93.bin
66515f81bca81d2740a6a73838bdd07031f16a7e46d5def98ca1b95fca50b59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 17796 bytes
font_01_sfnt_off0000f9fe.bin
00b616a6b0549afe807ed1795618a179024dbc7bf37af0692343a0bc0a2dcbd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 11460 bytes
font_02_sfnt_off000114b9.bin
7b2c01d25f2ab23b3a559988d0797777b88c2ce84a54a14d8fec7111c693f143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 16232 bytes
font_03_sfnt_off00012a9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9E 16792 bytes

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