Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c1ec0a4f1012d3…

MALICIOUS

PDF

123.1 KB Created: 2021-07-30 10:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e224a20d1a27702d3ba619cec7e79150 SHA-1: 3ef1b1c177ff76eaa3396f234571713add6088e1 SHA-256: e7c1ec0a4f1012d31645f2a6e4aee998aa0aae11d88f5732acf6a3d332571cdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics indicates an attempt to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://oniceh.ru/uplcv?utm_term=advanced+dungeons+and+dragons+2nd+edition+dungeon+master%27s+guide+pdf PDF link annotation
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608664e0cc2f4---61936605455.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072521295dfe---fozofalopejemolabagikurup.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/kowuzevinej.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/rapufodofamidamovewereka.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/f297367ffd70b551674d1d114f847dba/kajonema.pdfIn PDF document text
    • http://dominoliberec.eu/images/file/files/sopajirowagizezujejoron.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/doxozujusuzuvig.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/bodavefuro.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160731eff34829---78758169342.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/97370828795.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/gavidajefalisimom.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2fe63d335---zutadeduzezibigoto.pdfIn PDF document text
    • https://airshow-bg.com/file/37529709135.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/wotukanepuro.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7imoumsp5jts4c7o7t444a41pn/dosubamek.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/pkk36ljh61e21vrk6elrbfib48/8564650230.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb6af1b8fd---32833114034.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/cthlhj4l5mahlo4i49i9ualjqh/tuwopijapopofukosizotipu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/gikfp5e2ll16jlnd88llssjock/sepasujifuximeturelemaf.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/9b8a9eda3fbeae0afdf322ab7b45886d/zulidupowog.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/lekositawezivo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/jexulibalunilovolutuxax.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f602c69cda4---jazawekesapoladojup.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ac368e3a4---48470169350.pdfIn PDF document text
    • 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_off00017b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001934f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1934F 11216 bytes
SHA-256: 3bd678d5eb43e42e2cbd9cb8bdc243594353acbd6d6a0909d1a6170c23f1420c
font_02_sfnt_off0001ad88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD88 19176 bytes
SHA-256: 3a3c0e4547621b272a799ea6f4257b0c92f909832e8a36dfd747ca2ce9d7041b

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