Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7ce1c6c5f04579…

MALICIOUS

PDF

87.2 KB Created: 2021-08-11 05:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 381f003b1d20a9336eafc83d83524f52 SHA-1: ba8f80c21343a0f09f0010b727d5b01964d6900d SHA-256: 7b7ce1c6c5f04579476b14a34d5685d5a5236032eb90a86eded30151f4e930b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI links and link farm characteristics suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7088

Heuristics 5

  • 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
  • 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://ketchas.ru/uplcv?utm_term=new+hindi+movies+in+hd+download+best+site PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1245b71511---98206108613.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc7b0d30f3f---60491171619.pdfIn PDF document text
    • https://motecx.com/images/file/lobisadonuzi.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/kowilidalelazunafilesi.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b9a4b9e51---61781158623.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/fulibaxipofomuvasozi.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/13941755272.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/ruxidejili.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/27d814cf8dce7dedbb72435b611aa29c/fiwol.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/61614910220.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/gilap.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/532a87287230afb1608d9247e0239c9f/xidifobon.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/madomaragotele.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1a77a89a---mosuf.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a44bf787---75007191942.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/sipof.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/85baf2e34dfb8736e674cf1cb5941679/pazufaduzefarapewejej.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/92869337013.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/vigapirile.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/farugizogukad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333998013---debaruporaso.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/lifigefajose.pdfIn PDF document text
    • https://cncunse.com/d/files/limovedanimalaxuzibazo.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/43153267768.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fed6e3842---dedozutox.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db7655982f---8011430355.pdfIn 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_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 16956 bytes
SHA-256: a805efe3f035f695fd22b50afafd000f20713d1f158f652fe5a884e808728925
font_01_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14075 10680 bytes
SHA-256: cf756f6c3f7b2620ff13eef6031909d6bc970ea75771a4cec97c9c1e33324a68