Malicious PDF — malware analysis report

Static analysis result for SHA-256 0001ec4a2684e1fc…

MALICIOUS

PDF

92.7 KB Created: 2021-07-23 04:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74e27f4958b3e31c69d08c3b0cbb8b05 SHA-1: 778175c6494063d249409a82412384d3938076aa SHA-256: 0001ec4a2684e1fc02da094b2b243dc93f7490f35bedfbf82de6f79d5b2b2d77
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, such as http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609044a5b867d---pagagawumizimiga.pdf, are key indicators of this redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/d7a77tkhepim2nroqb51vratfi/dakokalodusil.pdf In PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609044a5b867d---pagagawumizimiga.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/75257035772.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/441f24f146491a67a352219a4c690c00/9713020043.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/57265602933.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/51877998880.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/kudevulejawujuki.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/10915182bcaaa3739cc437f4ae10fb84/nuwebasitanitoba.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608793def2d33---tumodatekikixejubexaf.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210705150133_c2F4b3plcGV4YXZ1eHV2.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/2dadc653badef5be03ce98763e5185f3/10228308551.pdfIn PDF document text
    • http://hevolta.com/upload/file/81407506282.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0623d843ce---goxitazolate.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/mimilizesoziposazukafuv.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/tuzekimuzelubipu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6b6b513db4f32eb79ad8b2b9689b89a8/wusesujowofuvujuxu.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/04dbf818f81c0e33cbff33e561a6b609/wupajuvojoduwuzedo.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/wovivuxudigokagarojub.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/72114205769.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/tasewuje.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160beef63eeb43---jivujerokamumajizenoz.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d3de51b7a244f85c1c130a94c50c4cb0/89737919373.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d0648a17ed7---80397810044.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/karoxujefata.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/88893565704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=peace+lily+cats+toxicPDF 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_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 17132 bytes
SHA-256: a7f590830158027ad50038f9e273bc6434a62e24cff00ba92f91bc304480941a
font_01_sfnt_off000135ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC3 10236 bytes
SHA-256: 3067d20e6748dbf9ced7adca9fb472838e2b0326a6dc60a99b8187f09a97014c

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