Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ee67d8f8b5247e…

MALICIOUS

PDF

75.5 KB Created: 2021-07-22 19:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbb68304eabda081ce39cf3afe1c887b SHA-1: 8be3a4e02c4ccf6001bed9629add4d66b34ac389 SHA-256: c7ee67d8f8b5247e013a8c88a1752b9acfda9ff86625ea4886145a2bd72a92af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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 http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/xojikarewujizukuk.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/eefba718f10334d1ccbfae7f25af9ae4/43133489962.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/31117505062.pdf
    • http://speaklifeiamgreatness.com/files/files/rejebagotu.pdf
    • http://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/xezebiniwogaxedepopizowas.pdf
    • https://thefertilizergranulators.com/d/files/93185268602.pdf
    • http://plkorea77.com/ckupload/files/tuludo.pdf
    • http://studiofapas.it/userfiles/files/nejusarunexa.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c395dcccf9c---14005938253.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e5c4b43fd---xibaredubo.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/6ed5de438c677a958dfe461f113bb708/mipifutuzotezewage.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160773f3986844---74718581557.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5a9f5a62f71bc0af95f1fc7e4f50eb9e/jositemibaxukudijasose.pdf
    • http://sllight.ru/design/img/upload/file/pugonuzisodet.pdf
    • https://sonntag-immobilien.lu/userfiles/files/tufogevaluwi.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609849472edd5---85489647236.pdf
    • http://tasarimak.net/ckfinder/userfiles/files/gerodevewepesinivemisika.pdf
    • http://aquatrustfina.com/userfiles/file/dopofu.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bqkc2vkrsgq3gdn0plh534itsi/76523225342.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6217aad9c---velatanodomodiliju.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/leio8c4uau2dehfqc1adluj6qc/pajikire.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i3iqat7gg5vum5es3rfe63odom/15224480285.pdf
    • http://biometria.pl/photos_fck/file/65059508939.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a155c355d24---83747926278.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=your+bad+luck
    • 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_off0000c58a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC58A 16792 bytes
font_01_sfnt_off0000dda1.bin
654d793f33338c2dd770f7ff27bc6e622a63c74d50b30315536c9947a5197c95
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 10084 bytes
font_02_sfnt_off0000f428.bin
7cbbb1863ec94e1c696ec334a9ba9f9cb3f6be386e4d9d239e1e8ca71f7f2a08
pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 17248 bytes