Malicious PDF — malware analysis report

Static analysis result for SHA-256 37057b9aba02f500…

MALICIOUS

PDF

90.9 KB Created: 2021-07-20 16:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58f4bdeb69ff49ef9acc48a082f49e8a SHA-1: 01137753da2e9d283a7513a1bae1e77cefa9ffba SHA-256: 37057b9aba02f500d6fe9413e7dfa89782b1b0998d55f4d4766e990d95fb0086
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://ridendo.cz/files/file/82073875128.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b203a163a4c0439a2332dafb38c9bf21/pakepile.pdf
    • http://wabasnb.com/files/fckeditor/file/207861809060a95b088a5e6.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d4554948---domilefegopewijadivuler.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/cb46ru3i6k4qiggp85toi3okoe/luzuwusobefazulezoduse.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a2417671d9b---89886020931.pdf
    • http://www.anclupnapoli.it/userfiles/file/58052917579.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6cd9843f4---dofebujusawododilelukokez.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4d4d2decb42e8b4872739af9c94dcb4b/42101631969.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7e9e3633---woxewusure.pdf
    • https://tonitomov.com/picture/file/potusalagidujutofisowu.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160987c8b09219---nasubifolegisagez.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/0c8cec9bef7357ba07bbd4cf6709f25a/28209618768.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/0o7e8rl7ifkoi5is71v3p765us/79386143832.pdf
    • https://strategieb2b.com/userfiles/file/dodonirel.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0c4572ff---milisexunaninalepuperuf.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/36844061633.pdf
    • https://agentcctv.com/userfiles/file/80996405838.pdf
    • http://sevimticaret.net/userfiles/file/kiwev.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/turnliuu3s3k8ul7tg527ttcqp/88736890643.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fallout+charge+card
    • 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_off0001036f.bin
c63171fc52d7b497fd98f9d3781d42a1e2d9f0a47a1f7a17dfbc9f08c88712c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 10364 bytes
font_01_sfnt_off00011ac7.bin
18c4cfa712caa75b99ed5c653f85b461a0974bc61ca65c71bc4ce2f996d70d83
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC7 16816 bytes
font_02_sfnt_off000146c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x146C3 16792 bytes