Malicious PDF — malware analysis report

Static analysis result for SHA-256 0477a60a3286aa93…

MALICIOUS

PDF

86.0 KB Created: 2021-07-26 05:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c51569b114a5cc87cee94fd60196d5c6 SHA-1: 10a43cd950931f17d2af6e15beb8201c3a775481 SHA-256: 0477a60a3286aa934824f9957e31b25f0141c6666048450ff9613ce9c6e1a153
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nmcs.ca/userfiles/files/54505809134.pdf In PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9301ab59b83f6db45a9935e734de9dc0/90796924349.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/lorotorimeguzo.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/5003823908.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/da260d1433e68742f95532970e2d310d/90516490561.pdfIn PDF document text
    • http://www.heksan.com.pl/file/salavovazap.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b26a7c73---jujopimomominodemixenira.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160858f2d21bd7---dekowud.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c4993c043029d7f8f90c61aead05eb10/85014595046.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/3603243928.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/89497442507.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/demezijepopaneluwaximut.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1c981bc82ddc0181ccb37f390c4aafbc/13941217472.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160762fcc1a499---lojekazapebonu.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d1a5ad5bb---tebemogi.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/20374490955.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a1910bd24eb4ed183f67c8890f6e08e/11598806374.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/34173647233.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f0484a63---66256688162.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/35581167154.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/veduxaw.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5f1262c5---lamabiredivi.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/27649248151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=samsung+watch+active+2+ecg+europePDF 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_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 16732 bytes
SHA-256: 04190fc655bbb8ba307dee2287695760890d92d078153810fae68dc9b803260a
font_01_sfnt_off00011862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11862 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13079 11224 bytes
SHA-256: b2bf8c36dcb832933955b567c5ddfc56eced8f05c17d61a478a09f01d7eb0137

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