Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2fe3682052e3f8…

MALICIOUS

PDF

78.0 KB Created: 2021-07-27 13:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a390a0f7f454ff1d89c086e2d614d69 SHA-1: aaa7ba0b18b321da8dc767b45cd747f67c6dc327 SHA-256: 9d2fe3682052e3f8fb605022a445641ef2bd2ade0303278fadd1d92e6f89136f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead the user to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://alatheir.com/atheirwsfiles/file/6598439060.pdf In PDF document text
    • https://megalightgroup.lv/uploads/files/10631452708.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/159nrmn93ot3j2dkq15jro4c9m/55677384240.pdfIn PDF document text
    • https://actorconseil.com/files/file/90587684966.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/sejofexamonewavavakeza.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2cb3a9ac8---tesikazax.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609282d39642a---52023469489.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/54418dc2f99e47f550ef13cc0fb08963/70163003175.pdfIn PDF document text
    • http://m2m2design.com/userfiles/26867458650.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/fomijonamapodirivibisiw.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/74316657582.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e6c62f552088ed8c424c4b22b83b9d8c/fakududejafejokomuwonit.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/21200651179.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/81718008341.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/wibuf.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/08e2dc95c93a9bbe24cd10c22afd122d/26426252256.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/59188495780.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/sazosamof.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/kozazibafoxujisid.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160763d887d070---65987470806.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/99822386788.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e60933c84b1---86369591181.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/45897773815.pdfIn PDF document text
    • https://basisnomor.com/contents//files/vowutigurepemudot.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021723353331028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+clean+thermador+professional+ovenPDF 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_off0000cd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD76 11028 bytes
SHA-256: 4a281cb9e638c850f67f00114dc63f3c127d927dd2485bdd0616b77fd9909423
font_01_sfnt_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 16340 bytes
SHA-256: 56cb73a9ac86d09354c09ce51470b0cf9fda2c52bc8a992e2f63b1e88c0cc6b9
font_02_sfnt_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1