Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e0bb76707fceb2…

MALICIOUS

PDF

82.8 KB Created: 2021-08-22 01:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d9aefba286c6ede677e9f9ecd2dad1f2 SHA-1: a99b4bc21f01c26cf60ee62f2cd52922c37640c2 SHA-256: 89e0bb76707fceb2978cd4d873747aa6de6237c87eefe7648289b10413b504be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised websites, which are used to host further malicious PDFs. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm structure, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' confirms the use of compromised CMS upload directories. ClamAV detection and ML classification strongly suggest malicious intent, likely to deliver a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/lpeegm69mulogcfi9fglje1bgc/68206989202.pdf In PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5555dfaa8---28860258379.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0987789e4b---56946217608.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/62034559413.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c2fc9dbfabf9e2fddac2f9ce057301e1/tufedizitivisemumudewos.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7rutuaur3njbdek2ejjrehfgsn/71515184026.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e06a18a870---wipafonejedus.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/mosadumosavujus.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/53307396248.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/cb868ee2b0704ed43979fd051c190b5e/bapizavudefakugo.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0072fda8d8c2c59b98608605b32fe8d5/dizepasawigumepewipobo.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/91113777950.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a65f0504e74---29214975318.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052611484543.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/wapawaluginewiwo.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sabexojefup.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/96707323764.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160883401281d4---bevofesan.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/57912744071.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/83041161426.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/40802342223.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161040ff5326b3---tajegugoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hr+diagram+worksheet+pdf+answersPDF 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_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 11068 bytes
SHA-256: 9bf9d89dd1cb437f2aec4510cb2f7185a0dc021c8a72d0ec83ab1f21900fae38
font_02_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 17276 bytes
SHA-256: 8f8627bb528da46a8a02a97b9b0ca3f5980d10ba1f8d7ebd1856973954ec08d8

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