Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2463bbc63c65f1…

MALICIOUS

PDF

75.5 KB Created: 2021-09-08 01:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a9a8abc603c0d2e6e7870b06d39138e9 SHA-1: 4e7e2a948232e8114b64de05af26cb9ec9596574 SHA-256: 0c2463bbc63c65f11aaa60106586abb9799cef5cb33eddf4166eef4f11a64ba5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, with several URLs hosted on compromised WordPress sites or disposable domains, suggesting an attempt to obscure the final destination or evade detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://ludifrance.fr/userfiles/file/61149973105.pdf In PDF document text
    • http://axiomestates.com/userfiles/file/69397507331.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/33750253045.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/962d763782b435c4095e0363cf15b83b/wewiregijevunuzebugebud.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/d393f0f8de6992d2018dde3a108d0727/kufokolafivedexulubenogu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05ab85b968---85299614207.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/bidiwe.pdfIn PDF document text
    • http://usagimatur.com/files/others/86972208901.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/97772514540.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/36071393720.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5s8g4b616qiv3nqo9olnlvf1o6/vifujove.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/rorovomexatewapirakot.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/94eb05eb3f49fb481169d19d0dc57749/72588329441.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c661da13d45f8f8ef470e0769f886e8b/25621818233.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/32o5145nf6jmhn1d8e0kclj9qj/53936552209.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608689f46496d---libakejunevaf.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/68846834915.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/23078567025.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/72cbda162a98a7034558f809da95f2aa/97811231007.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0c7c980a---ninipa.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/tofobusifig.pdfIn PDF document text
    • https://badoza.net/userfiles/file/86270533199.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=amsco+steris+autoclave+manualPDF 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_off0000c42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 17168 bytes
SHA-256: 38d6d09e760d13e7283c30657ed206fa6249ddcb585b09f344638e755c9130ad
font_02_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 10540 bytes
SHA-256: 07f2cff8efde4607d0ed311caa0d24dfbe1a20b4f19edcecd3fc7a10f9b308b4

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