Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b292110ede56a1…

MALICIOUS

PDF

102.6 KB Created: 2021-06-29 07:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f48a6756ba01d470fd171438735df42 SHA-1: 5f2a2b6ff44d1e82dcd5cfefd8452636c3de8036 SHA-256: 89b292110ede56a1475594821e40776dda22e49e9c73ea5c13beb0311c5b8caa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into providing sensitive recovery information. The numerous external URLs, many hosted on compromised WordPress sites, suggest a phishing or credential harvesting campaign. While no scripts were explicitly extracted, the PDF format and the nature of the heuristics suggest potential for embedded JavaScript or other malicious content to facilitate the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 7

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • 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://archism.ru/uplcv?utm_term=repudiation+in+cryptography
    • http://sicilyontable.it/userfiles/files/fuvawoxusavelokusixajudad.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6975d0c3d35eeae52ae6ed5496020140/vumegogunofovi.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b4889daf5ab---zugiv.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/llvl8cbf4sdeesp2hvqvclo7n4/27468134631.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ae85c10f3---betejoj.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b627a08ca0---vokilikefasunusowekekun.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a64dd87262e---bitinatusu.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/29bee1d363883ba6e5346e66aa1a45f2/8122571130.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6436b5370---masakotabikolijesil.pdf
    • https://rugsinc.in/UserFiles/files/daxemizulizesegozow.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c2de42cb643---tedipi.pdf
    • http://romanakladatelstvi.cz/userfiles/file/80707164039.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/eace69d40875e5add73d1ddd9a8a3d45/79660064143.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/9208c0a888a3c45076fdc66b636d1df9/gimifarelirufaderoxufela.pdf
    • http://tnslib.net/userfiles/files/52554984235.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6jgd9vjt2lmo0e15dn0hd7q3ls/49790003718.pdf
    • http://grupophi.es/uploads/files/35587078076.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/248f54ffab1573babdc31ca6f41685cd/8359966866.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607170782ddc5---wuwaxufin.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b004603a16c---22085776740.pdf
    • http://auxerretv.com/content/public/file/nexesat.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86de342936---44063917341.pdf
    • https://lee-trading.tw/archive/upload/files/36172501871.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/eda24e2ecc605c05a6754dd676281d66/87869847027.pdf
    • http://nhadatv.com/webroot/img/files/bajakujipafologi.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7f31f1df---85948275575.pdf
    • 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_off00012e2c.bin
586715f5850decbd91e74d0bf3148a1de62e58ccd217152b797a035d0a359f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2C 17504 bytes
font_01_sfnt_off00015c1b.bin
0e41a0aaec01af2230e3a5a30668e6c01697a10bc180acf1440666be794e97d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1B 10836 bytes
font_02_sfnt_off000174e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174E2 16792 bytes

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