Malicious PDF — malware analysis report

Static analysis result for SHA-256 0201ddafd9919dd1…

MALICIOUS

PDF

95.1 KB Created: 2021-07-20 10:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fad839f1d0d0c8acc59c860203876fdc SHA-1: cba1e0f39fa7d3dd37283836738cb2cb0a45c340 SHA-256: 0201ddafd9919dd13136c72f8d02fe281be52af5dc839eb8684d1bac0f1d4fd8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, likely intended to host and distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the nature of the links suggests a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 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://anoh.net/pds/userfiles/files/kefiserigezusurexir.pdf In PDF document text
    • http://makesomenoise.hu/upload/file/gofaviburagoriwogikenidu.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/99193239681.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883448b88db---31458428385.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/gosajokaxikopufut.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fa2611ae---30799141143.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608254f5c62b7---52596024233.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/i0rbfcuohq91udhebe8qc80td0/83765182535.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2e8f34b2d---zobokokom.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2471dd58a---1742632774.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac9d226bd---20340145562.pdfIn PDF document text
    • http://anthonyellisonfamilyreunion.com/clients/f/ff/ff850d76676c1858bf5e443b7a907d3b/File/48983424603.pdfIn PDF document text
    • https://airshow-bg.com/file/fufobupe.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/26745395751.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/19334481150.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/47802169410.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210709144217.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5d9d03b165ac063a83c196e343b9ed82/42729281225.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/josagetirawuforiki.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/52931336905.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/vafavibakawijedok.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/sivaro.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/worojif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=phd+research+plan+examplePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 17308 bytes
SHA-256: 2bef524eaf32554a4ff741374558863849f0da72c49eea9acddea47d38ccfc2f
font_01_sfnt_off00013f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15756 10572 bytes
SHA-256: d456e6a9f7c8df251051c5dcaaeb1549f3d42b7ed1bb12795263bb1654a3cb55

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