Malicious PDF — malware analysis report

Static analysis result for SHA-256 607ead8eb2b0b39a…

MALICIOUS

PDF

84.4 KB Created: 2021-07-16 09:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f20752c5ea339216060fd52b739ae43 SHA-1: 271a64e565fb604a77553f095ddc61fe89660a8a SHA-256: 607ead8eb2b0b39a4ed342c69b12bbe934f41b70e8b6e9c7951491e8d6e9a523
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://vegastel.eu/components/com_mijoshop/opencart/image/data/files/44383081565.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/41201556319.pdf
    • http://megalaserasia.com/upload///13596521129.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/43920309315.pdf
    • https://telorgabus.com/contents//files/86142127022.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160aad1add4c92---zebiwaru.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5d85b820237257bf2943b6492bf2e53a/6085681572.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b242f5dc---88833478821.pdf
    • http://myexamadvisor.com/fck_uploads/files/20532562338.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6c08547a---rabutupopasisadoke.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/3bbc40e3f0f544072e8d24080de8df8e/rojizinijopuwudaleli.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4e91ab9af---12180568734.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/4985b4266637b1e930581731579bd477/betodijavuduporaroratu.pdf
    • http://kinocosmik.ru/sadm_files/kujubusew.pdf
    • http://hongshengfish.com/uploadfiles/2021062220013090000.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fcf8e0964---41578122432.pdf
    • http://elektrostroy.kz/ckfinder/userfiles/files/dilozazowegagigexo.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74dd44de4---ronelisalogexi.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e628a323355---sobapoxura.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbc68d008b---badutategi.pdf
    • http://aldo-ins.com/userfiles/file/6617250353.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c0c4e10a1---3638022854.pdf
    • http://bielwod.com/userfiles/file/givevu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+electronic+ear+muffs+for+shooting+2020
    • 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_off0000e5ab.bin
640016a8324c9ad46c89f1147c51cdb6a4a07643fda29414a38d530477226a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 16988 bytes
font_01_sfnt_off000111f1.bin
83e0ac2db7923934db5a7ff756e398d16fc3e0f595b1019b1297edab27d18898
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 11180 bytes
font_02_sfnt_off00012bfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFE 16792 bytes