Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e56e4654fdfa0b…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 07:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d3668e0adb60bf1f5a5c53e1111b953a SHA-1: e28b7bb07435ffa63023b8eff756f49711add2e4 SHA-256: 75e56e4654fdfa0b395165ce4af408cca012f87dc52b3841d7c8d0fcc2e130bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=moto+g60+call+recording PDF link annotation
    • https://coil.hk/upload/files/30637538950.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/6109398395.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d65d1b867d---22095706778.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/lububapujunepe.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/18814796895.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/51135164631.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/jizisalazevavemoxu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161379c7f077e8---94020270609.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/59437494950.pdfIn PDF document text
    • http://adfaveo.com/image/files/20210921_052356.pdfIn PDF document text
    • https://kermanrooz.com/img/files/nesekojuxi.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa89921c4a---17667653088.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/80732681953.pdfIn PDF document text
    • http://hongdacable.com/d/files/72581114903.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/zavagadesawoluko.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109250919431507.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b812379---sajinabukediwuzopakukidi.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/boxunut.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/73392430171.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/zadukerutomuludemigujep.pdfIn PDF document text
    • http://neowork-rh.com/userfiles/file/kujegizorupe.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/32171084186.pdfIn PDF document text
    • http://lulanjina.net/upload/files/megum.pdfIn PDF document text
    • http://wacommerce.net/home/integrity/public_html/ckfinder/userfiles/files/relupaluguxidej.pdfIn PDF document text
    • https://terracell.pt/images/file/notulenamibavizi.pdfIn PDF document text
    • 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_off0000b4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 16524 bytes
SHA-256: 793f680cbf73c1baf49f4daab239d8ed4feccbbfd99270349fb6ec129c53657a
font_02_sfnt_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10660 bytes
SHA-256: 2e7cd88bca15f0d0352c300b947d478ce88b7219ae9c5a1a422e7d355ef5c5c6

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