Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0212b18d41cfc1…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 08:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8ab60df2d461df5849c2e6c0c64bbbf2 SHA-1: 4e1cce32780e731ace70cedc1f53f2312369999b SHA-256: 3e0212b18d41cfc1ad34659fdb6da63f6bc9ca143f43f39b6c8d8c12c8ffd044
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics strongly indicate that this file is designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://infrive.ru/uplcv?utm_term=galaxy+note+2+android+5 PDF link annotation
    • http://hb-hospital.com/file_upload/fck_upfile/file/47475351252.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/fodamisobiwoditeloxuwi.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/bosavegimilebifoxo.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/wusubirosomagibowewose.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d7156da5---daxupafenevij.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/wimudatugexujamumaxemid.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/19326902332.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/nefadixidomiwunutuveze.pdfIn PDF document text
    • http://balone.net/_upload/file///84785419722.pdfIn PDF document text
    • http://sun-eko.eu/files/file/jevamijavotukobekupanemi.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109160024332881.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c1600e920---29268271576.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/40527899009.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/bezexiwikajadizi.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/70485049900.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161427c5a54627---52335209264.pdfIn PDF document text
    • http://runhouchem.com/upload/files/seran.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/11162974087.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161312cc795359---telijasofurejekutepiv.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/dutivemaminagipigatebiboj.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/tagejusiwidid.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c1c879b12---57395732177.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/sinojofiremaniwe.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/fuzafeme.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/vezolurugoziwet.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/92603291655.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_off0000da6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 18636 bytes
SHA-256: 1296d86aee6594cd9418a5895c8921536f684c5ef7d7e4a1960eece0b335ca0d
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12304 10584 bytes
SHA-256: 190f2ea2d42423744b4f8264e150dc13c7314cf1e27da8225c7fcd6f35dd8641

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