Malicious PDF — malware analysis report

Static analysis result for SHA-256 77015a755dc725e7…

MALICIOUS

PDF

84.5 KB Created: 2021-07-05 21:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 445a1b79eb189062a316a2a466b4eaf2 SHA-1: d8733f6dae9d9441f1e64db261238eeab3b18018 SHA-256: 77015a755dc725e7b3e589f5cf3b1a33ec75912f758e9f268a92788c47900de7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

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://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/c2f400100a60743252f51b8c71529a8f/jigokikifipixubinomudi.pdf In PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e84235c5bbb051d7029d5c31f84cf537/lezazikututeb.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/aff11e90fc9886aa0131e7262362015f/17760277848.pdfIn PDF document text
    • http://954move.com/clients/4890/File/76564536842.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/f67decb615f65a7c9d4d4c79719efc41/54545394712.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/2ieua46s0rep93mctgfk7kq40b/muxajanemefurowapatanen.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/jewerokovosilo.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/989525842.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/14891075742.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/4tbcu49ttvgqg9hc1hktintps6/25671965077.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/df54ab36c124cbee3db808df79998d00/65985473074.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sariruxibesureronekivav.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c415d4ab7---wolol.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/2c3bf8275156c206c3d25e1fd128d70f/69662589942.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/sozisozenek.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/0c95724331ffdc0ee7e33ab0f2980c00/bewudotufawof.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/aa9cae169b44f9587a76589bf8376f99/vejeponovip.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/b2c73e0f0d23b3d6f4c0232efa6f0d38/8549513458.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/fegopepavenadomelep.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/sodakonugako.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/81060278128.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fa801e886---dewudemamaxu.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a79e417b3---rizojozavixumafipekedoxu.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8bac150f91dab5ed0d3e20a8fea51dd9/26240970961.pdfIn PDF document text
    • https://afayl.com/userfiles/file/sizojuruverokebajiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=11+kwh+per+dayPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0D 10108 bytes
SHA-256: 9cff6e404d3c9226ab30f04a57f3fdbfa19e68d65d9266f9f75cbe3351455202
font_01_sfnt_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 16340 bytes
SHA-256: ce2bbaf86d004772dcf9742c78bf90269ac6db8ebbd73f126831a557b8a88b8b
font_02_sfnt_off00012d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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