Malicious PDF — malware analysis report

Static analysis result for SHA-256 74aec4932b33590e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 03:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: af7bae81a0c244a829ca5f01292179a6 SHA-1: b1e322312d564e20a98e0904e97d6d9cbf131246 SHA-256: 74aec4932b33590ee480b7c7ff0d3e03681494a69e86da449659cfad601ae54a
184 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of a callback lure further indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ljlconst.com/admin/images/file/rovevezizeparino.pdf In PDF document text
    • http://redskap.ru/userfiles/file/46992382318.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ce035b913---606834492.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/nimuzeki.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a8784d1f4---99874461558.pdfIn PDF document text
    • https://invest.pl/userfiles/file/252055661.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/5116925429.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/42210013072.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/50597139826.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/xivetagudobakavuginiviza.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/xafofiripetobemesinid.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161351542f3aac---50855683919.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/numilukaw.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1613924009e863---59378243218.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/wajevujasawozat.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/79661010013.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/daniw.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/95336259456.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/22307696235.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f61b0022b---18611781029.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/8235725112.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/fatoxebib.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/74238225553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=delete+gmail+email+account+on+androidPDF 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_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 10648 bytes
SHA-256: 53a8cac0a6310551f07394adde45372f526ec170221a12c1d29ea9807c5adcc8
font_02_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 16940 bytes
SHA-256: 0bc07ff592bddca5e3d7ceb1497f5483c3161bcd305312a34cd83fb7d1f7f223

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