Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc74aa1a069d2726…

MALICIOUS

PDF

76.2 KB Created: 2021-09-29 02:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2401f36e2aa49359f0dd3b240adf27a SHA-1: 1c294224fa9a6c46b90ec5e2cda53e331646a1ac SHA-256: cc74aa1a069d272683c8f309e0511815b33904312d509aa52d46776e9d66d05b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on potentially compromised websites or use disposable domains. The heuristic firings indicate a link farm designed to redirect users to malicious content, likely a phishing lure or a downloader for further malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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.
  • 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=how+to+win+friends+and+influence+people+bangla+pdf+download PDF link annotation
    • http://onlinemidias.com/ckfinder/userfiles/files/lotegelabevakafazotosagu.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/robukepopilufero.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/nuzuvopavamonigapakok.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/karutudegewuveten.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/kefumalu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613aba3d1ab53---pajinufapumuneremijotulus.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/5521185978.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pivapajuwila.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/02f6be92315c493c3626998cae849eaa/34458386420.pdfIn PDF document text
    • http://i-tos.com/userData/board/file/45067521534.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/vafinotazowimanamud.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/beminavab.pdfPDF link annotation
    • http://mrpokedb.com/uploads/files/fufosadumemibowokupijoja.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/gijirimidudivifafozigikib.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/92882945631.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/10707487444.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/dudoxiligevu.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/vovirug.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/085a11bc28d60d99eded2641b3956de5/sabovugizuxataf.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16145d7a79f91c---wejixovurexokitul.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/legalatumoraneworij.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/jowasetemekozefuwuganavov.pdfIn PDF document text
    • http://jonme.net/ckupload/files/74350365082.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/taponajorove.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF088 16864 bytes
SHA-256: 5e64f43cd10db32723e4ab65dbc1dffbc039ae428194538af7725d9a5bb6525f
font_00_sfnt_off0000afc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC1 15676 bytes
SHA-256: e66459e15dd281f61f984793cdadebea6e84516c1490d221ac36f1d725b790f3
font_01_sfnt_off0000d6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EB 11112 bytes
SHA-256: a4aa00edc24c74b485f0c6a0f89e2d6c50425d0af1298053d3646355bb4a47bb
font_03_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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