Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddd6bd01def196c…

MALICIOUS

PDF

95.5 KB Created: 2021-09-06 08:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b50968395b0000a2dd80cf2b798f916d SHA-1: 6f4f8c339c0b891f9ecab4d22f0813a2d001dfb7 SHA-256: 5ddd6bd01def196c183549ffa2a4e6a4a6ad38a6b8f98d050f41077a9fb5f8cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6342

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://irlanc.ru/uplcv?utm_term=understanding+chord+progressions+guitar+pdf PDF link annotation
    • http://novichiha.ru/pic/file/64453616892.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ek8u8tlsasdufqko18dd6i3u6i/zibijulozoladuranumopetu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6e7534f51---nenoleli.pdfIn PDF document text
    • https://penal-garazh.ru/files/54218702633.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/ug896cgie26rjhng9v8navo1b7/safuwupudifo.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/46566338179.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/97313675606.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdef0442e85---medizeje.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/47c7b79eceff2491260d72dfa7cf68cd/nisowukuzi.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuwotejipib.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894b7f9528c---gipedu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5d8de8a52f8b9b663ab03c5a5f5b6758/kapepirifulaziruwopupa.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d91960c10---vawakezufurozojutegil.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/28622664801.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1e0ee5e638abe93adcc41212a6388214/fizokikixami.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f392fea0df---kilojubep.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/bupojaboso.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/0747c4667918ca5aea39849bd7d88690/jenogugosurexunisisonus.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a209a6d7a68---zajixudub.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/44332268680.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56f9fe8898---23042692360.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/db048227e2d3f12b53cc53ec5e3794a1/jokitomizix.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/jisezixumapakinobapepupu.pdfIn PDF document text
    • http://riceart.ir/basefile/files/fesibaverujajexotowus.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_off00013b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001532d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532D 19392 bytes
SHA-256: 32e473f244bb0db03917bc85cc339273f793d44607ddfbad1d8e035c503f9270