Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dc8ce32a6e377c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 03:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 97251283a59912995bdf5527d9794f22 SHA-1: 3d41c626581f47eb520e615c0c9f7433f132a6cf SHA-256: c9dc8ce32a6e377cd69783ab8af9d4fdcf0a5d5e0e253c9018c72e4709531870
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The heuristics suggest it impersonates a cloud document lure, likely to trick users into downloading further malicious content. Numerous URLs were extracted, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://vejwun.cz/images/28385210566.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3407a77d3---37552531793.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/72370892666.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/nojipuriz.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/xokobewarifirumumujetuse.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/zedoduxejin.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1d3a73d582c1787572f87dd1610593e8/98454878494.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j0doqu1tc478b5a2fc9g0aerh0/danib.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/wuzaramuvu.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93261477538.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/086d9ac402573f1be1ae23c522a1011a/99712223653.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/ef10362e511f187e9865ad48b4b55bfe/firimi.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/75426349965.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/fetegurugepizajis.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/kagozagosotarewujomeg.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4af72cec1117100373b333ce0499caa7/92419803434.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/mupanawe.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/0387d33bc405631befc6ee21c7a9a167/seduweja.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210824110156.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/gbjngeomab425fs0niqp0i2ia3/jabozixip.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fidabexulekenudej.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608670d35c2e7---sivupemopusaxizakij.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/fafisameje.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/zoxevadolada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=shatter+me+pdf+google+drivePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 17268 bytes
SHA-256: 6163e5b21a8d0fb039dc4739080524a84825649de4196991eb4a0009e014aee3
font_01_sfnt_off00010bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12403 10812 bytes
SHA-256: eb12139250b10f71fc467eeffcb01ef29815a9e1d083ec19e682d12528164517

Open this report in the interactive analyzer, or submit your own file for analysis.