Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccff7c5711db7f59…

MALICIOUS

PDF

95.5 KB Created: 2021-07-17 15:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cebf26124edb1df06340493fc9306d2e SHA-1: ce1f896ec251fd9fdf037188b1988f4401bac676 SHA-256: ccff7c5711db7f59546d5a3109f939d0d8e1e8b1349fef34f0abae25527518cb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially malicious content hosted on compromised CMS upload directories. The presence of multiple links on disposable hosting further suggests a malicious intent to distribute phishing or malware payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.1876

Heuristics 5

  • 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.
  • 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 http://textingrights.com/userfiles/files/sosakuxewavosegafaku.pdf In PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfc699a039---kulekejibofisu.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/36519843216.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4cf4c5814---51048958131.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607285d83daad---74650276644.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160811d0eb623b---90962249682.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/99057462721.pdfIn PDF document text
    • https://kaisar168.com/contents//files/21083339742.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/37690403032.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/95725549123.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210707_2B4433EB25D47C82.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/os804k9qob1j7ldj1lgi8fonq9/niram.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b0hmgaaurq37ofpoktco26erjb/juvajimamewijawokigu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0cd8180e71---vegusurudipedina.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160aee0c2e688a---91225929589.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/hmbm4mv00vhv62ves60g0edht1/tasematex.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/uph6ndeg1b1lf0bbuhn43a2as1/mubexilexubeliga.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72a9ce0adc---72392486364.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/1978d050652379e626e65f756029cce6/solalajilobuvejorikoder.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/nejubafujaxemusebudupiz.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca955f2eda---24153400909.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/cc6c9bdced1cc397da74bc1361061794/33857808038.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/67622372ba1923fc0c7fde189f7db342/bipotokasezaxir.pdfIn PDF document text
    • https://fobh.net/userfiles/files/12221632921.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c75d5c600f---8513653094.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dvd6c3ir20cm0fj9kv27l2fmat/36070854712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=spruce+street+harbor+park+hoursPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000123e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x123E6 17360 bytes
SHA-256: 06774f7d7920263e6601454bf8b2663481f3826aeab13dfcc5b69a5db96820ea
font_01_sfnt_off00013e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2F 18556 bytes
SHA-256: f7969d9b73fe3052dd674f32c72bf2b28ffc40db3e9668fee335766c4b6f02f5

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