Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c95bf14dc9ee14…

MALICIOUS

PDF

101.5 KB Created: 2021-07-04 02:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a40b8874e451f48611c416033d18910e SHA-1: 00d7870a3c78f3cc2d99204de5e488b818eccd05 SHA-256: 49c95bf14dc9ee1469ae51b54df079556b5838ea0c488de5129217879a7b97d1
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farms strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://boothbayharborshipyard.com/userfiles/file/xiriwitufuragipematar.pdf In PDF document text
    • https://waroproject.com/file/40665380054.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/51931271348.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/57194948422.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098f98a6a55a---21109925616.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/8485f6ca316a44d37a41355991772ebb/50248195434.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c25b4ac1f88---jagarusumurazofadusifu.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/s74edr7sji8977lhis0p2k5vgm/sidod.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wemifopadupukexet.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916c86a1f27---83008559932.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6augh4p802a4tiin7h1rfn49o0/47530758168.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b2828a7a4f3---zumemiroriwuvepusuxoduk.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/55603309862.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dde2de6320---voratorokatul.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b953d8c1645---doxusabusa.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f2d4cdf62---wumegufoviwometosavigiwul.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pesef.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79158a666e---zutunefadap.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/07d5fff0fbed36d14125237f2fd48b28/kunudopoke.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/74d2237ec507504f6fd18574f20b1bf4/19522758499.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/nowema.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/magoratomanapumufotit.pdfIn PDF document text
    • https://malikcolsys.com/userfiles/files/51046044293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ending+of+the+wolf+among+usPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001421c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421C 10872 bytes
SHA-256: 7fa173ba4001c78db505b59d6ec465e3ff9e9e8da89e3e38bef1692ebc0c2f07
font_02_sfnt_off00015ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADE 17460 bytes
SHA-256: 74396de9fac0d698ebc39a09b9356fc6ee41cd925ab3a8a165f6058e7f8f54b7

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