Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dae49bcebccb0e…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 00:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c0a02d1c7140e045cf62fc35aaf03fed SHA-1: 1a06529aede804fb7e53409e5b95a9aa38cfcfa6 SHA-256: e4dae49bcebccb0ee068f30bfd8626b520a1ae6863a8dbf1e66e0dabeeaff8b4
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to various PDF files hosted on compromised or disposable domains, a common tactic for phishing or malware distribution. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions, a prevalent Business Email Compromise (BEC) pattern. While no scripts were explicitly extracted, the PDF structure and URL patterns indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://argumentua.com/i/file/semasiwuvaxaga.pdf In PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2b97192f3---janopole.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/bavudezokufajetobaxevu.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/mejonod.pdfIn PDF document text
    • http://builderall.info/userfiles/file/84037048593.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/24002669093.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/2097121003.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/23514667304.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/bezebadapujaluwegafis.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/63231958713.pdfIn PDF document text
    • https://activepymes.com/pub/file/48338471020.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/008e285eab480e11b92b04053949fefa/zoxazizenazinozizotavurek.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/wibanizulanubadozori.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/xexiludekadolelufupino.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/luregixid.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/tiguwedimopowemekevixe.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/46a6fe1dc7eea6a1694fb485ee8613e4/xoxisomavefuwuzomufuj.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/32577079738.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/55146908351.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/gisijevi.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/setarum.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/jn7h787r5jbctdj9psamu4rqm1/37982422324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=merged+and+acquired+companiesPDF 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_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 10952 bytes
SHA-256: d24105ad321fdc63de37a5d1fc098bc2a488473ef446a5e92f39d431ed9e7f1e
font_02_sfnt_off000116bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 18348 bytes
SHA-256: 08e3fd862f07e05e23836569ef728cdcc078d97bd2abcee1654a7bda962ddb3e

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