Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7db2ef622f7e17…

MALICIOUS

PDF

84.6 KB Created: 2021-07-02 18:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b3c0cb1e037c6a8e3b325bcc9d464d33 SHA-1: a5eeea8e18dff09db6bcf1a494bc952223b8462b SHA-256: ad7db2ef622f7e1711dcfa3503f9ce63d0ba08a166a0ceba52d7b61ac1273c07
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV, specifically as Pdf.Phishing.Trojan. It contains numerous external URIs and link farms hosted on compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware downloads, indicating a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3776

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://pistant.ru/uplcv?utm_term=operating+system+chapter+1 PDF link annotation
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ibgaild9d60uqsk2iqvsjrdbke/fimunifekazizekigol.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210618024913.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6074c45f05e6503781488b10f899167f/98633988506.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a60f769726---55363490279.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd85297ab7d---42273924474.pdfIn PDF document text
    • http://dvarenda.ru/upload/file/45839839442.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861e7610226---45123823030.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/kajorufulorazupelis.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/32117937552.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b9e8438ca---26113281143.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab83d4f274c---pimawezutevefo.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/41488398681.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/87678455655.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160997f6e0fe3d---3549805984.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c32a865a1a7---96670736111.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c11eb98c4---kupoxividigelutidonilofef.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/nuropadas.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608acdd45ca44---52205658597.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8c0b0da1ad91dff723240d8b1882b87e/pepopemututawipapex.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/3bosot9v2gve9ojiccqq1bmh07/renesuxeligoweja.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/dusapadumiwo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/822221e31aa6477ac70c467659ab377a/98511187541.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/noborotujavakusonixer.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8555bc71fb341defcde51535ec56f430/zanutinisibevudefusuboxas.pdfIn PDF document text
    • 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
font_00_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 17868 bytes
SHA-256: 169a10853ee77cd59214964b863ccba6ac2156746f584275573e1dddae556167
font_01_sfnt_off000131fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FD 10844 bytes
SHA-256: 5df1f133346d865dec8edab5d41f68bbbda712d004e98f32aea8497e17e21af2