Malicious PDF — malware analysis report

Static analysis result for SHA-256 96da5764ce6e8311…

MALICIOUS

PDF

84.3 KB Created: 2021-07-19 07:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc3eeb1fced2596b2a4a663adfd6aa0f SHA-1: d393c9199dda39605afd5f2344e7316d73710b34 SHA-256: 96da5764ce6e83118c7f15a48e14e64a4ef747e8f33374f01a92499728199de7
156 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains. These links likely serve to redirect users to phishing pages or download further malicious payloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/411eae9136e01e47522de326b2b527ca/39048793785.pdf In PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/dea735d24453fa5cbd72289c07e28e8b/32446453223.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/15492435599.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/ginoxoxudagidatelido.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/59329198209.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/20421468940.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/jadipukizinagufeb.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/03c98fb0092edc6b7249f87277b848c0/67240820711.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b31096cba8---87728482183.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210617184653076.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/28f59c406638c602daa7e45d45045e3f/fazegujezadixekafokomu.pdfIn PDF document text
    • https://room12shio4.com/contents//files/86702031175.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ba92a914d---53139724949.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/bipelimis.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/pitolugijobenovofak.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ade9a17d725bf7629fafa43d287f41df/37986311563.pdfIn PDF document text
    • http://vinmexindia.com/uploads/muxetowitukupemimujiwo.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/pavotozix.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891cb9e8967---zivosidusediserupuz.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb4f815d03---80446947227.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/sodedi.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/42415802368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+find+oxidation+number+of+central+metal+atom+in+coordination+compoundsPDF 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_off0000e30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30D 17524 bytes
SHA-256: f99a1c041594bc305d7876b2bd4d14f8f5d49fc92a76831e3f60eb34249a8fc1
font_01_sfnt_off0001113a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 11200 bytes
SHA-256: 722635a37054ccc6f644d968551ebc773654258b67b7b13c0f9d366c85bda4d9

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