Malicious PDF — malware analysis report

Static analysis result for SHA-256 69314222f886c126…

MALICIOUS

PDF

105.3 KB Created: 2021-07-20 14:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7d5500fe269c85d01d8f876340b7c69c SHA-1: 4216367fc54c784cbd78a775e63ed3007530ee06 SHA-256: 69314222f886c126f38c334a6537eae982a505ce989607d7e0e28fb7e74885f2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress installations and disposable hosting, likely to redirect users to malicious content. The primary attack pattern involves luring users through a potentially spear-phished document to download further payloads or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://geodez.com/pliki/file/kolejenamufe.pdf In PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c594a38c8---gasimaxatizokodavi.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081546209678---levukap.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6923c93c5fd4c504e37780905dbb4f75/99319980237.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/tolapuzexugaz.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/aaim5uhpkm3rbkgao7a5nqv684/17731992801.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/44e769e43a5173cd5b7b091254c3f42b/xuposolumi.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c36b3adb509---44268840398.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///bikujoximowewuwulegi.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/37378326403.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b393375adbc---19026155039.pdfIn PDF document text
    • http://chinalabware.es/d/files/nukexifi.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb8152bc0b---60719300725.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d506708438---86343825063.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/702a99ee7f5e3d4ecc8db19851145a51/rezojafizimoriwodijatakax.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc8cf28fb9---tebegi.pdfIn PDF document text
    • http://megalaserasia.com/upload///32207598344.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/8jj2geluramngbg2s3pfsjittm/popeboxuwixew.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a398888019---bozadudamenomoda.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/84986981878.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/089df777c811c9e1cbd57ea6360d78e2/67803042790.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/26227827713.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f2a407aa44d620d8e63a18017210e89b/44695235931.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/larumo.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bea1fc341db---98183597590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=safety+security+and+emergency+preparednessPDF 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_off00013753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13753 17320 bytes
SHA-256: 412a8c6d42cd04b659de2bacff44d6e524e21487245a9617b91d0bbb3b1cad53
font_01_sfnt_off0001642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642C 11088 bytes
SHA-256: d830e78e6c27e9cd71329ee7161df4580c584c90def67515e6fd787c95a9d884
font_02_sfnt_off00017dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1