Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a5b7ad0bb0b4fc…

MALICIOUS

PDF

69.6 KB Created: 2021-09-04 20:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5abc240df6e6976c53490d75d88c322f SHA-1: dbc9dddd602a02a3f615fbf6c9bcc27cffbc7b42 SHA-256: 64a5b7ad0bb0b4fc0989487e978402fe6ef3d2fdb900b7e1b034368fef9b9371
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of external URIs and the nature of the links suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=singer+9110+owner%27s+manual PDF link annotation
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607e81702994c---vudurapixime.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/zarijegi.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/gexotefadanoja.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/ugcg03ajriimuupqka0iin3ibe/dewezovofinuw.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6571092873---wogawu.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9b0fead3c5887a0bcf0bd64280364548/74299937911.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/drhrp87ong9kkibh983otvs3ir/13206164888.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/kivowiboleja.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/wubuta.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5794c7073---14990304002.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/sowukugesuxo.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/c61007c00ac0dec224d90a089e2f944d/34409048313.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/19l2oqh9sqhc1ai0tj25erqn6p/nujon.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/60312804301.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/pozunimesalaro.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161110d2b62ba7---xumepizasuwedapujamaxexe.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/fikusonesibutekizo.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/89281913288.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/buzokubalik.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/xisuzu.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/jowumagexudunax.pdfIn PDF document text
    • http://agro-partner.com/Image/files/65342530479.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/c7abd319d412583bc94912f693ca477a/41168481918.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_off0000b1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C9 15064 bytes
SHA-256: ee0a98d992bf4a2d37d311057a53f7a1b018021f81cef29346229cd077262f63
font_01_sfnt_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 10988 bytes
SHA-256: 26814d0ffcaa2d86b77c63b6fb4f0fe2cbb41dfb8682e87daf11e8e165e3aa94
font_02_sfnt_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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