Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0ba35346566939…

MALICIOUS

PDF

85.1 KB Created: 2021-08-03 18:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a8f11d890c28b641eaefdacbc559da0 SHA-1: 7f6e26c446be1bec90c93f46e75fe6331009c95e SHA-256: 1d0ba353465669394cb46afcf7b2d5d5d4d5370c07cb25e6f16b8edf041981f2
192 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 phishing and trojan payload delivery attempt. It contains embedded JavaScript and numerous links to external resources, many hosted on compromised WordPress sites or disposable domains, suggesting an effort to redirect users to malicious content or download further stages. The presence of urgency lures in the document body further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 9

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=what+is+the+meaning+of+the+story+thank+you+ma%27am PDF link annotation
    • https://dusunceokulu.net/resimler/files/wowasosudopozelekadunaxof.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a87d1d0bb086ad12705d08f72a0b9831/jakojilaguvezutuxevo.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99a6e33c3a---jaregum.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/wotogitorimitomarax.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d0ec0a5fb---daxepinafopovufesosane.pdfPDF link annotation
    • http://sbs-group.co/userfiles/files/xumik.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/semibuzokinirevapejejes.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f1619581---vabukuki.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/fisuwosag.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/97665112927.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f8e420b20b16cc89df58f857fd63ba8f/rutubeduzujapijideni.pdfIn PDF document text
    • https://abeess.com/userfiles/file/8769997658.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/3842124487f3bdf415d8c3232a211cb1/67275992098.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/zopigogabewiba.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3bca4eeae---95794880747.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/o9sb7bnph415bbe8h1859r1ir3/20852559368.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/tutomuxijaxolega.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/p40i50ln3itl7jn33si6oicnd3/wuvatamolira.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/34633971677.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/zuginovo.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fbad3fd0---revopedupifegog.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/82130619648.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/39039748458.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a6acaa6f0bff652e74447488368e0c66/vejemewalojatevunogamanun.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/36311578992.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_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 18112 bytes
SHA-256: 622912c91e0fb579c26242749550a24afd357217f561fc9412945d1977992bc0
font_02_sfnt_off00012c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 10948 bytes
SHA-256: ac1dcb50fad8b33480c55f4f7b59cec9f395b6ba15c6012d485141f99e1a4e9e

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