Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0a1a3715350e63…

MALICIOUS

PDF

99.8 KB Created: 2021-07-13 16:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7162368147cd16bf1d65d666043ad8c0 SHA-1: 8c54e80657e87e7fa9f7e93720730ed18cf516a2 SHA-256: ca0a1a3715350e630d468ccb126260139f72740018430dbee63c5334bc7d2049
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, while numerous, are primarily used to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608172399fee8---58179860856.pdf In PDF document text
    • http://innotec-industrie.be/userfiles/file/7753995618.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/74436275057.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/putesijuxemozapo.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/76369930934.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/tusowabex.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/33538807904.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/vixema.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/bugibitexesuvebakan.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2778639907c7282ac5817e0e44062eba/zanezem.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/68556834120.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/iid2vncgojdhmgo2sahrbvuh20/kaluvigibatizugalumikor.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/gaxomewogixesag.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/vumexaxowibiduserog.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077973faee4a---dividititemukutevij.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/875f035e9c9f81fd14b552800b718db2/92337006591.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/waguvaferobugegoterepa.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/76019874215.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/kazozoferuximaxipuwi.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/gagidusator.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e70ddb402e29a92fdb611184a52194a7/72867797807.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/abcc0b3500557c7d4dbb737e04314279/67104039404.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/39452129253.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/bd88c4d4fb9212b1c65415e929ef96d6/popakutagafepexofiwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=meaning+of+lewd+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00016784.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16784 16808 bytes
SHA-256: ab98cb4a3d37f9eeaf870e95a05a13771a75cda8350a2f5e1732a03224a2ae58
font_00_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 23628 bytes
SHA-256: 8fbabd8af987c204e137b85419e60cb297b4eec1817ff9633f9ca6492d844b3c
font_01_sfnt_off00012bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFF 10512 bytes
SHA-256: e23bc1c793629aab0a15f1b321ae909be2b65a894e345e57bb8e5ff3e5ffeecc
font_02_sfnt_off000143a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A5 2792 bytes
SHA-256: 7d53492c3ea14f2089d323e26fffc0785cf9907ed5d37cecb9a2e9eb9eb41a79
font_03_sfnt_off00014f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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