Malicious PDF — malware analysis report

Static analysis result for SHA-256 5296573b22f139b3…

MALICIOUS

PDF

91.7 KB Created: 2021-07-05 22:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8ed535b634072949babe50a0ab603090 SHA-1: 24560b174de8a42b3f516600c3dc2cc138daded3 SHA-256: 5296573b22f139b337e71cee57928f9505982cea7f60d993ac88f874d4aff1ee
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, likely serving as a lure for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/84374776727.pdf In PDF document text
    • https://bajrahrs.com/userfiles/file/xenuvenalobiv.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/4183666546.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c169dfb6548---97459668790.pdfIn PDF document text
    • https://parfumzone.ro/files/file/zomegapizidifoj.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/418164e23ac20209e2dbd2610773e8ba/vogik.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607965160989d---difaxo.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/6aagdouaho96uomgg4gp899hkp/jaxugazuzozub.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/2eb609lctp7ickj7jdtk3u5bd7/16446289669.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b07b1cda2e6a71c5657f1faedb69174b/remajanojit.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/chs1allgitadec1lbjs6i6qhni/39685598609.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210626205325_a5189c.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f2b7168bb748030cb4c6b35aaa2d54d0/rixenajalajegukininum.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/015cb993e44f6cfb4d6cbfda41f6c92e/14800209363.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/15876505787.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/kivepapugumafuzunopogekek.pdfIn PDF document text
    • http://ozari-ua.com/files/file/tisurejilujikat.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daf2a170652---88885591191.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a400b9f1101---niwipem.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/c1d5c3a7f37f12027dd629d621b17613/pakuporupa.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/8o68mir0n19h8l9hg5p2qn0b2t/5055372019.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/55c0e468a281bb33a8b538e77523c9a9/mizonulotukozu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f09462413c---lawezagedukij.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609822510071c---suwejenojugijodoseneg.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pofimeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=struck+meaning+in+tagalogPDF 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_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 10672 bytes
SHA-256: 6b31643a2ec793e3db5835a4ed663fd55f9e5c91f52a576d06094803f0fed3be
font_02_sfnt_off00012fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDC 18936 bytes
SHA-256: 455ece4dd15179b2ce629c32195259d5d452367fdf0cd71ba4e04fd32fb0b176

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