Malicious PDF — malware analysis report

Static analysis result for SHA-256 11eed0a249f36caf…

MALICIOUS

PDF

73.6 KB Created: 2021-09-01 22:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 63c07e03517979f0f66b34cf5f695e94 SHA-1: 41897c5f165246193a98229373ae9a5de3273267 SHA-256: 11eed0a249f36caf9173fc65071a329b977e568e635b39196b7f61a327a8ce6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF itself is the primary lure, relying on the user to click the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.eatvirukai.lt/uploads/files/kaweduzamagedovoriso.pdf In PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea76992cd---dakukadepabafewurix.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/mafulavuwezab.pdfIn PDF document text
    • http://accronline.com/userfiles/file/83669096982.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/pazelufarakoxidapowasopu.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/sapifodeva.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e785b27367f---rovuluzipofevewidumeliw.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50266822424.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dbc023de3---32233928826.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607cff040ee5d---95493592787.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/2d4ad935a79da9d296d58e0210fc5d81/vigufibodimedizuweketi.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/40999003048.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d00c7af379d---43398441583.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/98886744956.pdfIn PDF document text
    • https://lapiadinafelice.it/file/22792020841.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/talobenix.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/73518577962.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/wimijumijijuginevef.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/76121765044.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/nuzuninuriloxuxun.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/turumupusosikowoziv.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607471d8a5d83---gapewuwofakojar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=wernicke%27s+aphasia+treatmentPDF 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_off0000bf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF45 16244 bytes
SHA-256: 7f571c35bcba338b2713ca2ce3ebf55bbf401102e378643ff9abf58124d1686e
font_01_sfnt_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 10592 bytes
SHA-256: 5db14feb749df66e70f201d0e82941ccb39c613c720714a6f7ee12dbf723c61b
font_02_sfnt_off000100e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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