Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c53fd415a84f0b…

MALICIOUS

PDF

90.1 KB Created: 2021-07-28 09:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d37ff8dff55f0e72123f202461b389ef SHA-1: 9dd3830fafa50cb90b62fab8e36db4d8800affd0 SHA-256: f2c53fd415a84f0b29ce3b88dc77c73df0da1632de2f5037be96dcf1075352e3
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e170dd1fe1da60cc52419ac23ab451f2/darolimojasozowedizuk.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1668e10a58---turinumowukunivujuxajug.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7e6414e23---baken.pdf
    • http://newo.ru/files/files/zavezekadit.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f24a3bb4---44583730870.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/80c3cag90u9i406bqlfa6uho9l/torur.pdf
    • http://montagnobozzone.it/userfiles/files/morunowikigusuw.pdf
    • https://cowichanmusicfestival.com/userfiles/file/95519202524.pdf
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/81795855939.pdf
    • http://gelateriacool.it/userfiles/files/wuvuponinotowajizisumiruj.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9b57bd36---lajipudet.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/889b5caf0f11e91e1151292db7d32c3a/82451171739.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dm8idmfklvidfummo0jsl8n17o/taveweributab.pdf
    • http://safarekhoob.ir/basefile/safarekhoobir/files/fazaxudo.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16099e70ec1c68---laxobutivosoxuma.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/68p2i49gv3dv83r49t6oiunq4i/dabimuwaliliwololila.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6315v391hijr471netn7kdj721/87400968132.pdf
    • http://tbm-mova.by/images_from_html_editor/file/73448827089.pdf
    • http://www.provinces.cmcgeneralate.org/files/js/ckfinder/userfiles/files/mojorovoloza.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c5dd73372581339b17b5778ef3ae5215/2460832516.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3ae42b116---27454637246.pdf
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/37422875104.pdf
    • http://amandamaitland.com/images/file/rurinosogoxixi.pdf
    • http://placc.info/up_image/96444928365.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=statistics+for+management+and+economics
    • 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_off0000fe01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 16792 bytes
font_01_sfnt_off00011618.bin
ff570a79b6c28266531e585fe0c989cab135a88f7394d062479b5e3008a22742
pdf-font-stream PDF embedded font (sfnt) at offset 0x11618 10848 bytes
font_02_sfnt_off00012ee5.bin
b14651323b1308bbb63b2054b88e6b0f968da57a5091bcf5d57cf50804612568
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 16376 bytes