Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eeac7012d02473c…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 21:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c1db6e53f19b0245e6b204452e0e9c67 SHA-1: e0bcfb3a0fc9abb9367193a4eda4d4c0418e978a SHA-256: 8eeac7012d02473c77164ae944589248af990b7b1dc9658f3b61b8efa1c98a3b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The use of multiple compromised domains and link farms is a common tactic for evading detection and maximizing reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe32766486---80276664329.pdf In PDF document text
    • https://alarrabnews.com/images/content/content/file/nogemijilabim.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/86555085668.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7584939985321c0b734daae9b6cd9f25/26962755862.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160741722d092b---68095811241.pdfIn PDF document text
    • https://qkon.ca/images/file/84187970603.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99d12f6ac---8139536772.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/gezibaluvat.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7bfcea48efe5d15620e8cfc2f7432644/9352589230.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/90835270998.pdfIn PDF document text
    • https://pecsikult.hu/files/file/nowelobobof.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085d6bb9a4b6---lopilapaxufofoxirusavolax.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d028fa0a68---74810670312.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f833491c08df740ff342e461d13ca27f/50060495711.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/eeb31098dd7170e5b5df81e192d62c98/gepabiwularilufumoduxet.pdfIn PDF document text
    • http://chieucoingason.vn/files/38925652187.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6d72dd6c1667a7e9d1771d616301ff04/42555528321.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/3spgam02dp9c53bm7hg65dbn31/rizusodudajuzuri.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fovixajofojafuporimenufuw.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ef8f77ab1d898f662b6936b5c7964cbd/24045937650.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa136c66de---kikapasixo.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/45822634703.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/88126669046.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/931f667e2166f2930dca7c89ddedf637/78321215363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tepung+kacang+kedelai+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD313 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 10464 bytes
SHA-256: 84b0e00153bb16f85344ab469dad9eb94470b5b8a8cfedac91551ff8bc9a4380
font_02_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 16636 bytes
SHA-256: 52a1891fd0eb348895c012b352b077a57adec8db22ff41dfbe0f7edfd078bfd1

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