Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eda670838b3e444…

MALICIOUS

PDF

86.8 KB Created: 2021-07-21 10:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0e4422d57ea6d774b4c0e40bc79f6a00 SHA-1: 83e10cd83672303abee1673685dac04fb9caf9c9 SHA-256: 4eda670838b3e4444128185c7304d41710e90950ec540f285eafdf62f458693b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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
  • 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 http://jullien38.com/ressource/site-image/files/4453767685.pdf In PDF document text
    • https://autosaloncenter.com/uploads/file/gosibigewirufepaxojewof.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949decf3804---15423689472.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b7e9d9d1c79a4a0ecfd5473f84bd5ba4/27340062461.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af55ce9a8ed---keladotafosopenivu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc518d455fe---66673263304.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/27720836546.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/81254003802.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/61422734864.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/96707323764.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/wumutozufojijoximokax.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a102652d8---39231028627.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/1701834938.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/62635033413.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/16232435521236008986.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/23746414202.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d043e6ab8---dovukepalawamutawa.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/qavg2ndua18ankbv1kj2o4qv5j4t1th5/18436166106.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/fiwavebidel.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/mivofujepinofalarimewe.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/40ddea5c3829755a2b2ffca218bed6dd/14195216077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+many+bottles+of+water+should+i+drink+in+one+dayPDF link annotation
    • 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://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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 17356 bytes
SHA-256: db5bb31953b2b290022ac3f080c4beb529165bb3bdd774dba08bec48170b5886
font_01_sfnt_off00011bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DE 11140 bytes
SHA-256: 849e9636e010475a9849de1d261797227e12218404d0f4df262525baf3278a32

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