Malicious PDF — malware analysis report

Static analysis result for SHA-256 d030f8c80de23b1f…

MALICIOUS

PDF

92.5 KB Created: 2021-07-19 09:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 656035029198749538f5d90d9141c918 SHA-1: 1fd7377b70cb81c9c595280c0f8456246574445f SHA-256: d030f8c80de23b1f1fb4d91cc251114ae7bdcd3ed1d8de6d2a165276216c170e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, which identified it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The primary attack pattern involves luring users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://cravaluos.com/ckfinder/userfiles/files/nuvijifunaxugadelum.pdf In PDF document text
    • http://sportgalaktik.sk/userfiles/file/11597646901.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/70129425816.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ijpa367calupo8bp3mm7i8qnk7/mitesutisakademili.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/25b6a7defc7887f4d70bae18e8b8469e/repenemitafezijufusev.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/3361841876.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b3067db5---sowinuwaw.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4d2d7402---xagizulewesanatozigufevif.pdfIn PDF document text
    • https://bojovicsirogojno.com//files/34832769253.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/vitewetibonokejudob.pdfIn PDF document text
    • http://arnold-sitter.com/CKEdit/upload/files/ritozasatemorimi.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/pamebunodezokusubipizumuz.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/9331273636.pdfIn PDF document text
    • https://aashianarealty.com/file/saropujejabil.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608507b9b9756---jonixanutas.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082524236e5a---63374035158.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/2044931051.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/jeduve.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210531015426.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7480840192062bd1b6e14620446c4888/figesajanatifodegob.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa939dbea2---70165952661.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f5eac061e55f63b36d038e9d60122af6/68104058222.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/ridasu.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/62622188867.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb043c6699---lelemut.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/88936759812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=when+we+were+young+old+songPDF 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_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 17220 bytes
SHA-256: 85f64bd9a06b4631e711e992aede58cb5efb4247ba76053b610f11ee52fa6110
font_01_sfnt_off0001352a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352A 10468 bytes
SHA-256: 54e82a9b2566f091614252641a936bef264b3bac455742876f5948bffe391936
font_02_sfnt_off00014cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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