Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efe9d6b6c17b1c7…

MALICIOUS

PDF

103.8 KB Created: 2021-07-01 23:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a6a30e5e4d9415330a66bd225b4251d SHA-1: d1ad8eb0a3d45a229c756a08dc9d51f06e2d3a00 SHA-256: 2efe9d6b6c17b1c7bfe8089e7029824ce2edc94635d0e59f23b168dd0bf4537c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://imagebeaute.fr/userfiles/file/50577562525.pdf In PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vabejitomefofumasalem.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c438780ddb---resekegefunokizigatole.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6f27c609d---46867374848.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/pip9rhqdsjaspgp427j36r6apb/nofewutuxulaxetam.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/hb1jr1hs8r02atedikahmrnre0/49384210125.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985c2e53ead---64673402814.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/e3c5b048de148f4be3f8a893de096377/13491599813.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tivagubiwaveloxodujupit.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160933b509acbe---93555292643.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/kowiririrama.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/7676063811.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/99282401883.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/21728154940.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806d1f20717---lizamine.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/bf4c7c9acef4fbb14859c2ec187c5a63/64565860775.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4cc0905e---wanidexuvelokixe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607727356a1ec---dipukonoduzo.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/75919922845.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160822368e6721---56633358123.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/35771421378.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/15928441678.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=poverty+as+a+challenge+class+9+extra+questionsPDF 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_off00012d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6D 18900 bytes
SHA-256: 6451a3ad965e6be45efdd3e4d2ee3dc752f77fd4244072661139a604c61e9737
font_01_sfnt_off00015f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F97 11204 bytes
SHA-256: dd53615988c5ddad28e0c1fb4dc493e54f12cc52a15e9eb9f5962479934d57fa
font_02_sfnt_off0001799c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1799C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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