Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2166e4502de3714…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 03:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e9a2155b6e38a92084744cbcf44b197 SHA-1: eb7e58e215a652c246c9467615d06acb9b3f1ea7 SHA-256: d2166e4502de3714a886488e49b4249eb9391b06231de907e89fe5e5c05ab2a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://amatnieks.com/pictures/image/25474324998.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609e232ad6b11---91132424615.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/94nc3lrfju059ctpqnr17ehuu8/54580324864.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/7a461154ee13311a7e4bdac1507705be/gelaxujezedopitutoru.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/a13cf917ca97b619ff67b479c232b4f4/kunasajerafiworuxozifabur.pdf
    • http://emilygrilltogo.com/uploads/files/fakoserupotaduka.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35db13c6d---5602602274.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db5f27c17---42575229606.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160782ae12259e---70669557427.pdf
    • http://iaestedresden.de/userfiles/file/18019262658.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72887807f1d2d3657e0a0dc24c59e4a4/87950188282.pdf
    • http://rilta.net/userfiles/files/zifixaponi.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607073427f266---73975060787.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160812e6963791---xevutuwifo.pdf
    • http://grupopiscis.com/upload/files/90853650170.pdf
    • https://foundryindia.org/userfiles/file/zalumovo.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/5neeltp3itnnbesva38o7lkt1d/90445200303.pdf
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/ziledurinusijawezal.pdf
    • https://abeess.com/userfiles/file/vufasa.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/i0vkrn3nok93uov2blrmrqr8g0/20250226709.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081211b0a1c3---dokoruvolana.pdf
    • https://luminex.pl/upload/file/dosubipuzuzaxudegavoli.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae3b42afab---25635853792.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+perimeter+of+a+square+of+side+25m+is
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a8.bin
07e2a1470b19121f25eeccbe5c67445542988a8dab245882c9234abb6e658482
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 11076 bytes
font_01_sfnt_off00010a5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5D 16792 bytes
font_02_sfnt_off0001226f.bin
e0caab3b33331056f8a0af53aff9115da03871a77caf74ebe93c3bc896993d9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 17256 bytes