Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d77220740e5491c…

MALICIOUS

PDF

72.1 KB Created: 2021-09-20 02:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 63d009d2f0061a1f74fd1becb771c015 SHA-1: 804f1454ecdf2ca83b0d78370c5b2f2f67d9a65c SHA-256: 2d77220740e5491c203db23d1f8845d5a244a25d92c30333f74e59b959c43e6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload locations and other potentially malicious sites. The presence of external URIs and link farms suggests an attempt to redirect users to phishing or malware distribution sites, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=characters+in+dark+phoenix PDF link annotation
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161386062c7d21---70166606246.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/29258358991.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/063suostn5gdgtihtf59pd4hkl/62677400219.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/50220424588.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/xenugabidigogejuvesa.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16137d34287dc0---32119221107.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/miragirojif.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/7904178857.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/lojudebefawujugufase.pdfIn PDF document text
    • http://dhf-china.com/d/files/11022511116.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/zapapaxasaguwowujafesiwul.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/boxumovibutewigesux.pdfIn PDF document text
    • https://phr4u.com/files/mupekaromerifadusos.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/53239712011.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3e7f311bb---94586165704.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614069a68564c---wenelokakonux.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/56751858252.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/zazujip.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/lonugamowosebafesawawo.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/seminizuzatedanexinobopet.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/61454427734.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/vemepapebosujunok.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/20429267825.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/pigetozogopovanifogesivud.pdfIn PDF document text
    • http://sswjeans.com/files/vajumefumozodoregatiba.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_off0000b8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D9 16040 bytes
SHA-256: 856e5c8d239cf5de4801cc7aa06431432e7c07ce6aa2a955f0ca78c917405bf2
font_01_sfnt_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 10788 bytes
SHA-256: 896814124154dc2883aa5628acd7991403f85fecfe0a4b85e28e9fdac7066e25
font_02_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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