Malicious PDF — malware analysis report

Static analysis result for SHA-256 beadec8b5bf2435a…

MALICIOUS

PDF

87.8 KB Created: 2021-06-25 21:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e103cb9c59be35ee85f87fa23847cade SHA-1: 2a99e4113f36f5cdbe6cd3a5ce8b5e07f14791f4 SHA-256: beadec8b5bf2435a22b6c027f25cec2afd9c499588facea81e849f4dee325711
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to websites hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=work+out+smoothly PDF link annotation
    • http://perles-del-beya.com/userfiles/file/vasudidebediwilekilagew.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16092a98e3f336---sojuduzujis.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9277d4315---75745285885.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/dolives.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/romanosupeboxegobimade.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785bd6af5c6---86942699173.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/purodunu.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/akvi3jec9ppngangkjc6nir0v5/37102356493.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lnlkpld9e4vquji29v3etci1fp/65233199493.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/58d2bb6c8b8b5e12b2b63a6cf2efdfe0/moroxosiwafojiv.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6e726591ef78721db757f003bbd164fd/6695185642.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/32292910464.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/nipixesexutadujupig.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/92jobgdakgn180sqisgevfced3/94417177289.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd3748178---kozawaminofugib.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72a753c82---68856061627.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/cb7dda6bef814e224ed82f03406db540/43275562540.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed67b2a9b---wukujaxuvuxumiwekiwiv.pdfIn PDF document text
    • http://redactron.com/userfiles/file/lawunox.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/58054d64d553f77431c87d6e50593af0/95103645526.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/lejerekineral.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a985016cbc2---fekukepupifenuxo.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052520382417.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0eb2e42ecd5c31ffba59f0d35b189e45/juvabepuxaxap.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/20627390091.pdfIn PDF document text
    • 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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 10180 bytes
SHA-256: 1012435ec34afa5dc43df374b10cdad184c5753fd3b31473bd2a90f5ca23870c
font_01_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 18808 bytes
SHA-256: 819a8e7deac2ea892e0c5879898f02d5dbb348109b6d80a3ca808f59584126df
font_02_sfnt_off00013a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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