Malicious PDF — malware analysis report

Static analysis result for SHA-256 34740d65692ab48d…

MALICIOUS

PDF

87.1 KB Created: 2021-07-02 04:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f1596d7de0c87885adb816896c0666d SHA-1: fec6dd9fa14f99cc26a778393a0fe849a9bd7a17 SHA-256: 34740d65692ab48de45a41085cf546ba9048b51ab466cb914a6a26c47be62d14
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e8593d2b---parepuximutevepo.pdf
    • http://finproekt-msk.ru/userfiles/file/tixojewukoleder.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97a56186ee---gugufojamasijiv.pdf
    • https://rosycaffe.com/file/95001333950.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/5332690617.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/6868aae2527ef200608007f279f12929/fipadagikepufot.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29c3ae632---67755364253.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/rikukasomukateju.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160929eafdb2c5---84578466425.pdf
    • http://oilandgaswork.com/userfiles/file/7905545134.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/fe115c2b8dce960777062a6660b4d842/tidunizonivenir.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607392eb645e9---29093742988.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d886e7e7671a364c1f709079fbe30044/74527483264.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1362e2055---90689050576.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0c480c14---gogurejadevaxosuguf.pdf
    • http://www.darvidproperty.com/news/file/vixapegus.pdf
    • http://kojeneckezbozi.eu/userfiles/file/mefipe.pdf
    • http://posekatzahradu.cz/files/file/vokujesukojizuxogeduj.pdf
    • http://gwardiajuvenia.pl/zdjecia/fck/file/zifemuxomuvosasaz.pdf
    • https://behagi.eus/files/galeria/files/13481092974.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609465a95c257---46194196795.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16083019e4f696---235559197.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/2624a54185a962c73d0bc23572cfe7fa/kafewelotewuwinimogenujiv.pdf
    • http://mya1fc.com/files/ckuploads/files/42071514367.pdf
    • http://hani-bee.com/userfiles/files/65064120416.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=separation+notice+form
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f329.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 16792 bytes
font_01_sfnt_off00010b40.bin
f54147792ffaf07c8811444dc2dedc48027c92be181795da94be9b4ea31aa6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B40 10504 bytes
font_02_sfnt_off00012320.bin
02f58217e2ecf4b0e039e0107d56b292a63f3a7dc78e3a13da9b91d818a2bc93
pdf-font-stream PDF embedded font (sfnt) at offset 0x12320 16960 bytes