Malicious PDF — malware analysis report

Static analysis result for SHA-256 415219ad179e6f63…

MALICIOUS

PDF

78.1 KB Created: 2021-07-02 21:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83d3efb1c31042ff9319e1e0f4f3c01e SHA-1: d9d3cc883fa189f326869f01e7d8fae3bef52e18 SHA-256: 415219ad179e6f630d8d6d0b08816636cc09a6f02e5fc4d048cec1bf28769f6f
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, many of which appear to be compromised CMS uploads, suggesting an attempt to obscure the final destination or leverage multiple attack vectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://alliusie.com/userfiles/file/24235700583.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5a97677f068780a5e08638eb8a01197e/50407751948.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609167c309e42---ruxejoxodexurukaxo.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae1fa9a15---97043700537.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa090e563ab---dizetukolevatuveralato.pdf
    • http://womenscouncildallasarboretum.org/clients/85748/File/jusonawipisazotigopakul.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed625c1dac151787dea308cb03573ec7/nuzurikolimopozodibeto.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/3374573cfd7128786f499483cd945697/terutejuforidavevuvoj.pdf
    • https://chp-travel.ir/data/file/dititubekevadejinu.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609840254ab2f---lapinul.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/42136de1e0367dc0463767ac0f71b345/22134158291.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/58461035794.pdf
    • http://valdhans.cz/userfiles/file/46201108451.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb0c8b7d4---tukogagu.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ccc2910ab---36908576837.pdf
    • http://exmar.it/foto_fck/file/sobeponomazivito.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160751b9748ff1---34792832326.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gasixizagazagodaj.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edc7547d04---luxovagetufadogefutevut.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725d03d81d7---11760480301.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6e1ffaf70b291a9daed40b1682d475ab/zitedagomimifalezasi.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c767948cd8---zekivijibonusefikepisina.pdf
    • https://bcbc3399.com/upload/files/mozidejugewosaruvil.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/6ss9tpt3p4nqs8gg3mr2hs9pn7/51446013643.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c207edbec---joselarepa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=same+girl+by+r+kelly+mp3+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c99d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC99D 16792 bytes
font_01_sfnt_off0000e1af.bin
ce2ed7300c759f78563e52c0428d9d54af87aff9e51fa2983b1f94c73bdc85f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 17380 bytes
font_02_sfnt_off00010fb0.bin
50e473c6bf636fe5392a1e04490e5dff43153df4b03d1b1c3cf48fafdf760713
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB0 11148 bytes