Malicious PDF — malware analysis report

Static analysis result for SHA-256 98929e78f63d3c90…

MALICIOUS

PDF

111.4 KB Created: 2021-06-29 14:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1dface96d0a792bdec124830826b7494 SHA-1: e8d2acada6835ec4a869fe1571d87593c2d3405e SHA-256: 98929e78f63d3c9002cd3e1acbe2d75e5e7335b640c383593414b6fc4f7d68e6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://allytemp.ru/uplcv?utm_term=principles+of+microeconomics+8th+canadian+edition+pdf PDF link annotation
    • https://butterfly-propertymanagement.com/userfiles/file/46117346557.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/13017279955.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/83fb32b0323f9d2b3730f59f822b1a4e/35398915296.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/89573444801.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b231e2f7a---47417302561.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/74a6ljpgiog7il7mmcmcgvsgs2/13175256241.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1624599619.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/da35296179f33cdf6af77666b2a72584/tavabufakanenubi.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85793021f2---73628662665.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/tc7mi3b68qfahvn9h7io0dtpca/66992290147.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/58b5987bb00feade73de3f3a50b268d1/migulizujodo.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/166394d4a5a79a49b7e5326fdf74c3db/wetarebokosatirakekojote.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b108ee79f6---xivituli.pdfIn PDF document text
    • http://uamarkets.com/images/file/vupelebuve.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/cd10adb9c7306b01d4b7eb8d07b6c62d/sovoxowagikadek.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/46876463697.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3730a635---24184642186.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed7f184512---40541458887.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acf6b96428a---pegegokenov.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce629f2abe7---9290086792.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/zabajazuvitepofilamo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/dhp5fo7l9c1cgq3dahkm6q6eaa/kijevebadubixapum.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89e5a11d1---67768036428.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/88b1974a1ca9473bcfba644e21cfbaea/kikujepiwulowenarixefo.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/koxawopo.pdfIn PDF document text
    • 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_off00015239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A50 11092 bytes
SHA-256: 8a7d7e1c89c9a29da802e163690e3c532549084a6d4e5936d105a72dfbdcd4bf
font_02_sfnt_off000183f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183F1 17040 bytes
SHA-256: c4181b1f46fb26a7436a5210bc38c0e68f0764636d6c2b872947a40a7fcdee86

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