Malicious PDF — malware analysis report

Static analysis result for SHA-256 028fc95725d35ace…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 05:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 907f466f6b4a3fca0e302f10c7e3d46c SHA-1: bb74a863ea6ef1a93ce7be473dcb0a0587cd2b60 SHA-256: 028fc95725d35ace96ca51f24c4f0993ad79c920912b132228c04f1b400c11ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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 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://hanabi-la.com/uploads/files/fobalu.pdf In PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/g8k4pfg47qvjd8odqmvijuablm/kitofanibi.pdfIn PDF document text
    • https://heyratacademy.ir/file/rikunirerinetubivinosijaz.pdfIn PDF document text
    • http://electric-kernbichler.at/gokudafifo.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/91174878252.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/xagetarodafu.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/desesoru.pdfIn PDF document text
    • http://ccshecea.org/upload/files/75485045560.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/jofupiv.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/liziramibaxigefesozif.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/kaligivepezigego.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/vatasawojuzunuxemim.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/kabovozuxafaj.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/nuzodagakafutave.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0b5e5392e81ea9d9237b4fd8af7fea2d/31211693303.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/gezotebubizovojawo.pdfIn PDF document text
    • http://oris-am.com/editor_up/mavorujekuvawojojivo.pdfIn PDF document text
    • http://exosushi.com/uploads/files/povamozusikab.pdfIn PDF document text
    • https://oldd.adventurenetbg.com/userfiles/file/97997785352.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8b73c3b8c---puzipidijufu.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/80536771000.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/21765333559.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d01314b97b---51376737644.pdfIn PDF document text
    • https://congchung7.com/upload/file/28926891494.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/92152762039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+download+free+fire+diamond+hack+versionPDF 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_off0000d060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD060 10976 bytes
SHA-256: 8b957ada6e2a60511faabf57f9997b10b249fa6eb2069618fae7de4635113560
font_01_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 18028 bytes
SHA-256: f59ed52d98e97365bcc7d077441518662b0455564cdda37f61933e14c80c92f5

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