Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23577c311f7aaa0…

MALICIOUS

PDF

88.7 KB Created: 2021-06-26 11:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09bbbd387a90a59eb3231a72685b7d5d SHA-1: 968d102ebb830a789b66e14548e99a513f038a0d SHA-256: e23577c311f7aaa0c94b00081520068168dd0e2d917244779e24969728b8135d
196 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised websites, likely serving as a link farm to distribute the malicious content. The document body is heavily obfuscated and unreadable, but the heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa0f983fc---girajasovugememulalir.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/qsd0lb0ob2dl7bpofpjf38ijkl/13820347626.pdf
    • https://info-jimukyoku.jp/lot/upload/files/57114824891.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d8f5d9c4---ranadekimewo.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/79089c0c33758eea1340ad3222efc345/74050466888.pdf
    • http://abnicum.com/files/file/fewawowalig.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/17cee78a24282fd7c51208ddd0434c36/vufovanuwuzadigi.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5367dd301d---jasupenimoxarapuja.pdf
    • http://adabaskimerkezi.com/upload/file/taremugidinosimepod.pdf
    • http://rydelko.pl/userfiles/file/87375386612.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609a378942262---nufuxan.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/uhlnpobsaaq9reun6igvhpkm4q/jowezavutafomajaxideni.pdf
    • https://daismene.it/file/40839716534.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072d86372ab9---vubudivexi.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dbb04f2ad---wisarisanejup.pdf
    • http://chiari-web.com/ckfinder/optimist/files/46836470798.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/13198853451.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3f5e9d7d---98278418838.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fa13a4d41---96774133361.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bh5bkv4s6dbh33kc2klhvmo0f6/34873058765.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/16a831c99726e051b23adee65841fc40/makawifemixorepirovawakul.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e061dc8321---gefafapekomipeliditel.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7db9cb1ebc---76825186031.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/klq3o4maf9mdhohu5v5i29rh97/dedalidafotezijotin.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f003ee76a32a2d70912d0d9a830106a7/kosasuboga.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1012dcd3e7f02e8007b9b44b69fe71d5/sedezeda.pdf
    • http://www.themixchange.com/userfiles/files/jojovafoguvuseloni.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=turkish+cheese+and+spinach+pastry
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41b.bin
cef3f8d6ebca3f6524588f1493c8dcad9286b053cb2faf16550b937cd90528ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 18808 bytes
font_01_sfnt_off00012484.bin
7bbf3e5d78da5257b97714d710a46a9e87ab3be287a8364d6f5ef2c0453206f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12484 10712 bytes
font_02_sfnt_off00013d25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D25 16792 bytes

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