Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc3cbdebd5fca04…

MALICIOUS

PDF

87.2 KB Created: 2021-07-03 11:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ee4364fc1ae899ee53f00234dc4aa478 SHA-1: cc2b1bf313c21c9c7d82d2a7074ea8123a8b0a86 SHA-256: ebc3cbdebd5fca048756fe124dcbf64acec8bf85edf8297cb4a67a9fd22a3ff5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as containing a link farm and an advance-fee scam lure. The ML classifier also strongly indicated maliciousness. Numerous URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://orvosvalaszto.hu/uploads/files/filaxupapomoniwabalesoxud.pdf In PDF document text
    • https://ive-cal.it/file/1635677118.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607108698fab1---64969613149.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076b27dcd933---17367167673.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/61390039059.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/432181847.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/26493215122.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608504d736bc9---wiwujuk.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2pkc63dbhelnjhgkakrvhng2jr/fojimuvubiki.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4e6a1b854---pokonuxifesogusedabidupub.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/64821169684.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/c7505d5d2885e7e18aa076494e646ef3/kuwaji.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/55906089166.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5ae750485ab04ed1dd6569b8e9236111/tudeta.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n3a3658umvs8c6nkuf1svqhj31/pemusujivokisadufo.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/36044378526.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/q3u3mcv1rbaosvb4gv9er7n7e4/84294629917.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/64472604901.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bowawugavojag.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/902c7dbd698d0d397eca655de6d8c8dd/98935711772.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a758663e018---kaxijujeba.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/46352215189.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b84227c0f8---mimidibatajebu.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/61312660269.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa6a5446af---libisut.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/biverabawif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=property+tycoon+meaningPDF 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_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10616 bytes
SHA-256: c1e9fe08bb60cedd8a159435afae02e2840305366bc59fbc25c1692181293058
font_01_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 18724 bytes
SHA-256: 1cdf5d3f4e0e79ae84f3559a81d3c7d5931afd613e0ed03b208a6bfcd78f6ba2
font_02_sfnt_off00013785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1