Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b7ca0c0cecca2d…

MALICIOUS

PDF

92.4 KB Created: 2021-06-28 12:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b260698b71f22719ff44ff65ca1e3fee SHA-1: c80e2d8655240368a904728b4add9b00d5e15980 SHA-256: 55b7ca0c0cecca2dcea054d6f5ed1136672113965871b3033261c9fd401ab246
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many hosted on compromised WordPress sites, forming a link farm. These links likely redirect users to malicious content or phishing pages, consistent with a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ikhtmd1oir7qldlo4f6nu63a66/vukewotatatesixexaluxuvat.pdf In PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c89069964---kunaxonativakatasojupuz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/suxovumifoxerobaze.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5161125cd1---64088424447.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a575d6d7a14---nupekekuv.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e2f24f0e---topokenujunetudibib.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/66386298494.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/21p0ipgrbmnkhf78q8p9k586ss/rudopekonururoxezisa.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/g619t5la9guo4d826624l02ljg/nunakegisabinotakutiraj.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/pikivorigugovij.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80aae6cdd0---falejinigofiduvatuxuzu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9639d2141---voxapijukagosonumoxixo.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16091d8ce2ec3a---rotog.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/tilenidow.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/722711b8dae77fad708c809d8971227c/kelijolegulovef.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac50cc1dbd6---dewepelofe.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/3525bd75b8e9369ff15e06a2529aca3e/41263009593.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c49d51d2d---97610179911.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/wabutuvum.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/vibotu.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/7utjt3cgigs2sfollnqocsngd0/10038341740.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9e0086086dc5a9a7c429e8d525a3cdf6/kemaj.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607371e9a9aee---gidibobunaxujuzananozi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8edddc53926aa24a9f6553ff58e191c4/bupadipavepibem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=lecture+fichiers+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E8 18740 bytes
SHA-256: 7a7aab9512bc51c5006bae7b40af6048003093c8beec5e7b2b305cc2b936fa13
font_02_sfnt_off00013732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13732 16084 bytes
SHA-256: 169060ee3d4a28e10bf8902f35113a35e3026fe70e7561f94e8bfa04626d1e03
font_03_sfnt_off00014c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5A 10344 bytes
SHA-256: 4a84f2502398d079712be6a68603acda398219e9d1a4f67d2b712deb0e92eea7