Malicious PDF — malware analysis report

Static analysis result for SHA-256 20250be37f0e67de…

MALICIOUS

PDF

84.9 KB Created: 2021-07-13 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b9e5c473e3f4038a573f90571b66b41 SHA-1: 5e819522d8b2ef7a8f3dd8a97c2184db7b21c28f SHA-256: 20250be37f0e67de46aaeae6102c1ca53e20ea44202827383494e128fbaa180a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an effort to obscure the ultimate destination. The presence of numerous unknown URLs further supports the malicious intent.

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 http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608935afeda7b---50233708015.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1ab740d90---xomasiladutig.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/majawuwifelonuladesil.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ec2218fd448d3a208ab41349833872b4/51752498868.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608debb91fc33---19418778610.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/76634251352.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/dodokulazirikanuxatif.pdfIn PDF document text
    • https://armenia4d.com/contents//files/28728498053.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/71815c8aca1fd8ea732768ffc055aa23/fofopufabubimabarotaxe.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/94065544602.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/vajupepomog.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/qd1bijs0kjknjg62bhmljjothv/rakadexutobiwanir.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7ecbc22f7---14303629141.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4bf846dea---suxow.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b1870fcee---dojavajupamerofi.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/79637840496.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/wenafotojoberojuwewudasus.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/38205955310.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089707402e4f---34326346146.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c1c242f5a---65881710364.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/840lfqgn6qlrj1ua82pkd4pl9d/17808922692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=white+sangria+with+brandyPDF 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_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 17112 bytes
SHA-256: b66e54eacca5f10dd3c9f9a3c6794b8083f6498e09dffb8cae47412f069aa08a
font_01_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E56 10696 bytes
SHA-256: c8c14409510b81f80f13a7f178ca6e8b1e54c6b2e3e1be63bcfb8fbf285da014

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