Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcab46cbd1a5a171…

MALICIOUS

PDF

98.1 KB Created: 2021-08-03 00:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a46fc2a746c163297c1eaccafe8bb26 SHA-1: db6495c06fdf84363b260462e13173dcb2a1a8ae SHA-256: bcab46cbd1a5a171e38e29a2231b8f47ff2c914bb3e14a5ade34727a846256bd
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and heuristics indicate a high likelihood of malicious intent, likely to redirect users to malicious content or phishing sites. The document's structure suggests it's designed as a link farm to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

Heuristics 5

  • 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://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/r2foskvdc2vlecf1ts18o08m4f/73654624066.pdf In PDF document text
    • http://unipsyclinic.com/userfiles/file/20210709015912.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/dujufubilutexus.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/vafegojefinotubopur.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/tadonu.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/k5vbot4ufj6chlfdbdn4bmqudf/fujogiwovadijotediroto.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/mirojolamufejovev.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8es35c89idaolen9pluhv197cb/83789965373.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1c398594a---26085390308.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210728_A1B33709666B1BCA.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/96124776931.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f9489068b---pedosukewu.pdfIn PDF document text
    • http://asustainable.com/global/file/vanakujudowotop.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/48962855680.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607215c19bc04---47917791980.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe56abb35---78204631935.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/vuduruv.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/81586965023.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/a490e444c4db29225f15447b8de2a3f7/84675813544.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/jajavi.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/82860792490.pdfIn PDF document text
    • http://salkim.com/userfiles/file/kipubigesigojisepolizi.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/14289726559.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210727_33AE7D04B4DF4307.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c21b8b8cab---gogem.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/rotenazavadigewamodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=gunship+battle+hack+apk+free+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 11172 bytes
SHA-256: 15671e40e141df2519463a4cffcad77fc5a2bf620c241a5d2fa1c28c9027e4f7
font_01_sfnt_off000113fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00012943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14150 1744 bytes
SHA-256: fe85e0a8a2678545e8e288ad89090fc3bf64d51d8303fb23b502e97109b2793a
font_04_sfnt_off0001498d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498D 17988 bytes
SHA-256: d2bfddeb22094c14f68ec098fe97d75cbc75047147835c7340534242d8f8aca4

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