Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee69e3b18681aedd…

MALICIOUS

PDF

69.9 KB Created: 2021-06-06 22:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d31c5cbc9223e8a3a18b24c335655081 SHA-1: 2e8231a2b24ded1a33fb08061c38edbaf407b99d SHA-256: ee69e3b18681aedd43cff9467b6a9e719ebf96a9a1ba26c71a58007feb48e559
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://catamma.ru/uplcv?utm_term=the+rock+cycle+worksheet+pdf PDF link annotation
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc661ffa6---jafajipojesujabobuj.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/fa0et14uaml55qavsfm3guu7ik/weninupitaregixusode.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vn7mg65ur4ptkece5gi1v59821/rawitowefufidinemexad.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be5ebcbeb19ce6a6b2a76f7379321953/fejivobawifujunebibesoge.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbvkt4p263mj982kaiukmi7all/popiminizibavudosanepe.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d342067871---25288817936.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093e24fb6ceb---33404209597.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf93ea4954---wudekanine.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085448b4993a---88379448064.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/moxovovuwakagapafuwoduval.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/26e50063990446e3b4b377fd87a4e161/sigafogilup.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ebb6333b87a0ae883bc245a310946e96/vutuvukezo.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac130e99112---liveturoxemogojat.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48c3986e0---kuwivosikor.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/57852197459.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/butivoxit.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb958da395---kaveboburulelixivipubumus.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa448249c---rurebebefokirefefifugok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 5240 bytes
SHA-256: 00701deb99a1d1144fb17175eb8ae842dab48cf60ec6c7b61a796da333c224aa
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10216 bytes
SHA-256: 97490a7c794d1f4d6d0d4941083d333bbd99ae16c1aa170c53452c6848f5a5a6

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