Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e90194418812fa…

MALICIOUS

PDF

94.9 KB Created: 2021-09-16 09:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bfe27c4f9777adab8b229362e202d74a SHA-1: b14fee6925beacb41ab9416843c3f5faa492e1fa SHA-256: 27e90194418812fad4f2e3d2f81f3263ee3b69a1dc6dd9174cdd55216e0c0c48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://huntic.ru/uplcv?utm_term=joana%27s+leveling+guide+free PDF link annotation
    • https://client-sms.com/ckfinder/userfiles/files/5517941348.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/zunijoku.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090307510873499.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/57053991674.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/gufog.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd4b1b9217---37714143188.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/xenunesotunevetozejake.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/83935373908.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd08b666b8---36145730466.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/51639489149.pdfIn PDF document text
    • http://calisnt.com/uploads/files/waxagarovurinonelad.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f77aac91b3---zozarukulizudusatoj.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/49952991715.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613121d18bbed---23402809482.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/70919991142.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/tutowugamejaxikukosupesiw.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/40618905683.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/wumekuwowupepovisakometo.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/jigewurunugobalijitopab.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf15d2b68---dafetupilitakimesopisasa.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/giwefizon.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/xojel.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/kagirokijewutomoranaj.pdfIn PDF document text
    • http://spbi.cz/res/file/55557023950.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/38201465242.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_off00010c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 10620 bytes
SHA-256: 2f96836af8c9cd0205f68579b8e1143a404affae6e58ac4c882284741317f027
font_01_sfnt_off0001245c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245C 18728 bytes
SHA-256: a8fb246d0fb87164ed0ae96a9e741491c8635daf6dcc7aa5b9335bc3b94eeaee
font_02_sfnt_off00015581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15581 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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