Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3da729ae619e8c9…

MALICIOUS

PDF

95.5 KB Created: 2021-09-04 07:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e3f549b24e15ac6b7a79e52e4b10b24 SHA-1: 5111bdd4790b3435424cea3631e17549df90e341 SHA-256: d3da729ae619e8c9ac55cafa8f31315de458d2e3cb0a271de0067781a8ae77df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://paroles-vives.com/ckfinder/userfiles/files/95785575925.pdf In PDF document text
    • http://caopump.com/admin/userfiles/file/6970246279.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/84112857984.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790979e0498---zumelizeb.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/74873357170.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2201f65d765653851bc8af4ee8035b64/24531465639.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/29234018428.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/41394061449.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/niwiwatinuwoviso.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e60559d11b---34490251047.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d5c326c80---mebuvaraju.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607de1254a632---gapulasapopubugaziv.pdfIn PDF document text
    • http://somogroup.vn/ckfinder/userfiles/files/59211453635.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f7ac98cb3---12921601896.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/22798334354.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/zuxekiwotiki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74729b13b2---91842392873.pdfIn PDF document text
    • https://citronel.com/userfiles/files/90427818434.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160843e9e5cf19---21210316511.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/nekudaxuzuna.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbedda162e---lufejivijese.pdfIn PDF document text
    • http://citralandpalu.com/new/pics/file/wisuginozagivobexogipig.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/kidopobeg.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/13937321991.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6b1a9a21e511eea7d738312bf1444b3f/gufokerelo.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/fd3261493d9d8afb37ad65badf8f43cc/36012426540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=akshar+publication+gujarati+grammar+book+pdf+downloadPDF 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_off0000eb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 11464 bytes
SHA-256: 46fee98f946d1a130b4cf243b2816193d16f724990b4b3c6dc95d56bed29317b
font_01_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC3 22744 bytes
SHA-256: c461589ffbe60a231af0bc0eb68f5e487e9583cb6eb1b2bfa68a9fb0ec019f61
font_03_sfnt_off000158e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E0 16296 bytes
SHA-256: dc06ad727d83096a05c996552ea3006bf41c27f08d23672988fd58d7bf50b79a

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