Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67368dada02099d…

MALICIOUS

PDF

84.4 KB Created: 2021-07-24 18:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bd010cf9270bd55481d3b4d9407307d4 SHA-1: 449bbd4cf62161990a8c6bd4d0ce7445ab204f9c SHA-256: d67368dada02099d198623f9d89e2c5319f6a1f7e46061c4264466e58da980b8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised websites, which are used to host further PDF files. These files appear to be part of a link farm designed to trick users into downloading content, likely malicious. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04b7336f8---wabufe.pdf In PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/c865c3d57f5837823edae079057952d7/70963344841.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/dujenadovomiwifawiwogud.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/78a81e8d329cf2993d2b432a8815ca52/pufinakumolajadubixis.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67080deafe---60868499624.pdfIn PDF document text
    • http://healthywithhart.com/res/file/7055615659.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7fb14440---67101990910.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/xetipulama.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/kikujatesijumuve.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/251747e0de008b302a23817c380b0271/80704208168.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/jifer.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/3ccf1f00839b6401f8c6bd31f620e386/26263710645.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/50843646615.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb51e2d6d7---79794819207.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160843ca1a70f6---xoxezuvuzomiteberukawu.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3d1d54snkm59bruihbf3be3vl1/89251732228.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16074264db6bdb---vevowowulazuxag.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/zobexodamejomevakuwesu.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/93731093474.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a19fdddb359af807d8ec09a03d2a7eee/22781848797.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/ragilubaw.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc82b6802f2---foxajovit.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/btdlevkmjpa24m7ibg1v9be7f3/nakurunejidetuzeluzunixe.pdfIn PDF document text
    • http://haai.org/upload/file/bakusemabozikifarojike.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8243d9e1a55e2e75dac9706d0e15a4e2/15592931461.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ssq4eto86ucl72bdvc0qc4hjq2/55578376325.pdfIn PDF document text
    • https://inncredel.com/uploads/zodomusoroparezudonugozu.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/66978471921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+gta+sa+lite+mod+indonesia+android+highly+compressedPDF 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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 11164 bytes
SHA-256: ecbda5835f95dc721735d44c7db00458cb0f7ef0a9d19c06896024c70a39b5ed
font_02_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 18560 bytes
SHA-256: 69c2cb01bcb5e5098fcb5d9df277b0c8528b9a587d3b143c3d06ab38dcf6ffa1